SSC CHSL Previous Paper 14 (Held On: 10 March 2018 Shift 1) (Previous Year Paper)

The correct answer is 3. 

Key Points

• The error is in 3). Oddly is an adverb which being used to describe behaviour, a noun.
• Oddly (adverb) - ex. Kamal had been behaving **oddly.**

Hence, the correct sentence is Her behaviour around him was a little odd.

The correct answer is 3. 

Key Points

• The error is in 3. Notice that their has been used along with physical world.
• But we have not mentioned any noun previously such that the relevance could be determined through their.

Correct sentence: *'*The more energy we give to a particular thought  the greater is its power to attract its corresponding circumstance into the physical world through the law of attraction.'

The correct answer is Of. 

Key Points​

Reading the above sentence we find that

• We should fill in the blank with a proposition which is indicating the relationship between a verb and an indirect object.
• Here a relationship is established between the verb tired and the indirect object.
• Thus the correct answer here is Of as it is a preposition that indicates the relationship between a verb and an indirect object.

Therefore the correct sentence will be: I am tired of this, Chandler.

The correct answer is Enables. 

Key Points

• Let's look at the meaning of the correct option. 
• Enables - make it possible for.
• The only possible answer that fits perfectly is option 1(Enables). 
  

Hence, the correct answer is 'Enables'.

Additional Information

Let's look at the meaning of other given options:

The correct answer is Disobedient​.

Key Points 

• Let's look at the meaning of the correct option. 
• Disobedient​ - refusing to obey rules, unruly. (नियमों का पालन करने से इनकार करना, अनियंत्रित)
  

Hence, from the above meanings, we find that both Disobedient and Unruly express the same meaning. 

Additional Information 

• Let's look at the meaning of other given options:

The correct answer is Boredom.

Key Points

• Let's look at the meaning of correct and marked option. 
• Ennui means lack of excitement; boredom; lethargy. 
  

Hence, from the above meanings, we find that both Ennui and Boredom express the same meaning. 

Additional Information

Let's look at the meaning of other given options:

The correct answer is Temporal. 

Key Points

Let's look at the meaning of correct and marked option-

• Temporal -relating to worldly as opposed to spiritual affairs; secular, non-spiritual, mundane.
• Spiritual-  relating to people's thoughts and beliefs; unworldly, non-material, inner.
  

Hence, from the above meanings, we find that both Temporal and Spiritual express the opposite meaning.

Additional Information

Let's look at the meaning of other given options:

The correct answer is Cramped.

Key Points

• Capacious means having a lot of space inside; roomy.
• Cramped (small or restricted) is an antonym of Capacious.

​Hence, the correct answer is 'Cramped'.

Additional Information

The correct answer is QPR.

Key Points

• The statement begins with In order to tone up. Tone up what? Clearly, a noun must follow it.
• Only Q fulfills this criterion as it begins with the physical education program. Q is first in the sequence.
• Option 4) QPR is the correct answer.
  

Hence, the correct order of the sentence is, 

'In order to tone up the physical education programme, it should be reoriented and implemented'.

The correct answer is An application will be written by my sister.

Key Points

• The given sentence is in active voice and is an assertive statement.
• While converting from active to Passive, the sentence undergoes the following changes:
• Rules of Conversion from Active to Passive Voice:
• Identify the subject, the verb and the object: S+V+O
• Change the object into subject
• The active verb does not have an object. Therefore, the passive form should begin with you.
• Change the verb into past participle of the verb
• Change the subject into object

The sentence in active voice is in the future tense (will write). Thus, the active voice will be of the form: will be + past participle of write i.e written.

Hence, the correct answer is:  'An application will be written by my sister'.

The correct answer is Rita exclaimed sadly that she was undone.

Key Points

• Alas is used to express grief; sadness; concern. It is an exclamation.
• Option 3) Rita exclaimed sadly that she was done is the most appropriate choice, 
  

as it does not exclude the information she was sad, which is not achieved through the other 3 options.

• Note: You can't use Alas in reported speech (option 4)
  

Hence, the correct answer is 'Rita exclaimed sadly that she was undone'.

The correct answer is Millennia.

Key Points

• Millennia is the right spelling.
• plural of millennium = a period of thousand years.

​Hence, the correct answer is **'**Millenia'.

Additional Information

The correct answer is Or.

Key Points

• Debate and argument are synonyms.
• The writer is giving another choice for the reader to read and understand.
• Other options don't make sense.
  

 Hence, the correct sentence is **'witnessed a debate or argument between'.

The correct answer is Equally.

Key Points

• Clearly, the blank requires an adverb.
• Option 4) Equally is the only possible choice.
• Other options don't make sense.
  

Hence, the correct sentence is, 'two men equally strong intellectually'.

The correct answer is Upon.

Key Points

• You leave an impression on/upon someone. Think of impression as a stamp. You put a stamp on something.
• Other options don't make sense.
  

Hence, the correct sentence is, 'impression produced upon him by the unequal​'.

Additional Information

The correct answer is Powerful.

Key Points

• Here we are supposed to describe the wrestler, we need to use an adjective.
• Powerful is an adjective.
• Other options don't make sense.
  

Hence, the correct sentence is, 'like that of a powerful wrestler, untrained'.

Additional Information

The correct answer is Trained.

Key Points

• Notice how experienced has been used to describe the other wrestler. Since the composition of the sentence should be uniform throughout.
• The past tense of train will be used - trained.
• And other options don't make sense.
  

Hence, the correct sentence is, 'certain place, with a trained and experienced wrestler'.

The correct answer is Broadcast over the radio or on TV.

Key Points

• When something or someone is on the air, it means that they are being broadcast over TV or radio.
• Ex. She is going on the air as presenter of a new show.
  

Hence, the correct answer is 'Broadcast over the radio or on TV'.

Confusion Points

• Sometimes, it's confusing to select between the options 'Broadcast over the radio or on TV', 'Float like a bird', and 'Be arrogant'.
• However, the idiom is used to describe broadcast over the radio or on TV.  ​

​

Hinglish

• जब कोई चीज़ या कोई व्यक्ति 'on the air' होता है, तो इसका मतलब होता है कि वे टीवी या रेडियो पर प्रसारित हो रहे हैं।
• उदाहरण: वह एक नए शो की प्रस्तुतकर्ता के रूप में 'on the air' हो रही है।

इसलिए, सही उत्तर होता है 'रेडियो या टीवी पर प्रसारित होना'.

The correct answer is Someone or something with potential or talent but lacking training or polish.

Key Points 

• A person is called a diamond in the rough when he or she is having exceptional qualities or potential but is lacking in refinement or polish i.e training or education.
• ex. This show is one of those diamonds in the rough, a wonderful gem that almost no one has noticed.
• Diamond in the rough means underrated, unnoticed​.
  

Hence, the correct answer is 'Someone or something with potential or talent but lacking training or polish'.

The correct answer is Conjecture.

Key Points 

• A conjecture is a noun and it means 'an opinion or conclusion formed on the basis of incomplete information.'
• Example: There's been a lot of conjecture in the media recently about the marriage
• ​Synonyms*- speculation. surmise, fancy.*

​​Hence, the correct answer is 'Conjecture'. 

Additional Information

The correct answer is Immunity.

Key Points 

• Immunity means marked by protection, or not susceptible. ex. some criminal leaders are immune from arrest
• (especially: having a high degree of resistance to disease) ex. he is immune to diphtheria.
  

​​Hence, the correct answer is *'*Immunity'.

Additional Information

The correct answer is Have been.

Key Points 

• I will be followed by have, not has.
• Being is used to represent continuity in action. This is not the case here. Moreover, have being is a grammatically incorrect phrase. 
  

​​Hence, the correct sentence is 'I have been fortunate to travel with interesting co-passengers'.

The correct answer is Were finally installed.

Key Points 

• Doors is a plural word hence were to be used.
• Sufficed till indicates past tense.
• Thus, the door installation is already done, installed.
  

​​Hence, the correct sentence is 'A bed sheet hung on the doorway sufficed till the doors Were finally installed'.

The correct answer is BCA.

Key Points 

• The labeled sentences, if taken together, carry a particular meaning:
• Everyone around the narrator was an early-riser and he was a misfit among them.
• Since the sentence starts with 'Everyone around', B immediately follows 'everyone around'.
• C logically follows B as it talks about the nature of everyone around the narrator.
• A follows C as it provides a fitting conclusion to the sentence.
• if you try to connect last words with the first word of each part 'around me' and 'to* be an'* makes sense.

Hence the correct sentence is,-'Everyone around me turned out to be an early riser and I stood as a misfit among them'.

The correct answer is declination.

Key Points 

• The correct spelling is Declination.
• Declination means a condition inferior to an earlier condition; a gradual falling off from a better state.
  

Hence the correct answer is 'Declination'.

Truck is one type of Vehicle. Similarly, Green is one type of Colour.

Hence, the answer is options 4.

446 - 3 = 443

Same as, 552 - 3 = 549.

Hence, the answer is 549.

HER : SVI

(H, S), (E, V) and (R, I) are reverse letter-pairs.

Similarly, 

(M, N), (E, V) and (T, G) are reverse letter-pairs.

Hence, the answer is NVG.

Except option 4, rest of the alternatives related to each other.

Hence, the answer is option 4.

Except option 4, the difference between the numbers of the rest of the alternatives is 4.

Hence, the answer is option 4.

The table shows the place value of the alphabet from A to Z and Z to A.

The pattern followed here is:

1. CDFI →

2. RSUX →

3) JKMP →

4) FGJM →

So, "FGJM" does not follow the same pattern as other options.

Hence, the correct answer is “FGJM”.

According to the sequence in the English dictionary:

The correct order of the given words is:

5. Jealous
6. Jewel
7. Juggling
8. Jumbo Jet
9. Justice

Hence, the correct answer is 54213.

The pattern followed here is:

Hence, the correct answer is "25".

The table shows the place value of the alphabet from A to Z and Z to A.

The pattern followed here is :

Hence, the correct answer is "TR".

1) Rahul’s position from the right end is 39th

2)  Pankaj’s position from the left end is 53rd

3) After interchanging their position, Rahul’s position becomes 64th from the right end

Their current position Rahul is the same as the previous positions of Pankaj.

The number of boys is = (Position of Pankaj from the left end + Position of Rahul from the right end - 1) 

= (53 + 64 - 1)

= 116

Hence, the correct answer is "116".

1. INK - RANKING → Word can be formed

2. RAIN - RANKING  → Word can be formed

3. KING - RANKING  → Word can be formed

4. ACTING - RANKING (Word cannot be formed because T and C is missing)

Hence, the correct answer is "ACTING".

According to the English alphabet and their positional values:

The logic followed here is:

PRANK → RUESQ

Similarly,

RATES → TDXJY

Hence, the correct answer is "TDXJY".

The coded sign is as below:

Given that: 10 + 20 x 10 ÷ 20 - 8

After change the equation: 10 x 20 ÷ 10 - 20 + 8 

= 10 x 2 - 20 + 8 

= 20 - 20 + 8

= 8

Hence, the correct answer is "8".

Given equation: 16 ÷ 8 - 5 x 2 + 6

1) After interchange: ‘+ and x’

16 ÷ 8 - 5 + 2 x 6 = 9

2 - 5 + 2 x 6 = 9

2 - 5 + 12 = 9

14 - 5 = 9

9 = 9

2. After interchange: ‘+ and ÷’

16 + 8 - 5 x 2 ÷ 6 = 9

16 + 8 - 5 x 0.33 = 9

24 - 1.65 = 9

22.35 ≠ 9

3. After interchange: ‘- and +’

16 ÷ 8 + 5 x 2 - 6 = 9

2 + 5 x 2 - 6 = 9

2 + 10 - 6 = 9

6 ≠ 9

4. After interchange: ‘÷ and x’

16 x 8 - 5 ÷ 2 + 6 = 9

16 x 8 - 2.5 + 6 = 9

144 - 2.5 + 6 = 9

150 - 2.5 = 9

147.5 ≠ 9

Hence, the correct answer is "+ and x".

The logic followed here is,

(The sum of two numbers) ÷ 2 = Third Number

4!4 → (4 + 4) ÷ 2 = 4.

14!2 → (14 + 2) ÷ 2 = 8.

10!18 → (10 + 18) ÷ 2 = 14.

Similarly,

2!6 → (6 + 2) ÷ 2 = 4.

Hence, the correct answer is "4".

The logic is:

The position of B is shifting as follows:

BAAAAAA → B at the first position.

AAAAAAB → B at the last position

ABAAAAA → B at second position

AAAAABA → B at second last position

AABAAAA → B at third position

Similarly,

AAAABAA → B should be at third last position 

Thus, the correct answer is "AAAABAA".

The flow of river from town A to to town B is shown below,

Thus, town A is 3 miles South with respect to town B.

Hence, the correct answer is "3 miles South".

Some phones are devices → Follows (As all phones are devices, some phones being device is obvious and definite.

No devices are phones → Does not follow (As all phones are devices, at least some devices will be phones).

Thus, the correct answer is "Only conclusion I follow".

’Some’ is a subset of ‘All’. If in statements it is given that ‘All A are B’ then the conclusion ‘Some A is B’ would always be True.

Asians who are Art critics as well as Engineers will be represented by the common area bounded by the Rectangle, Circle and Square,

and the shaded region, B, represents our required answer.

Hence, the correct answer is, "B".

Table showing the positional values of letters in alphabetical series

The logic followed here is,

Each letter of the term is shifted backwards by three places to get the next term.

Hence, the correct answer is "DSB".

The logic followed here is,

Four is subtracted from a term to get the next term.

Thus, the correct answer is "85".

The pattern followed here is,

Options are consecutive multiples of (1, 11, 111)

Applying the above logic to each option, we get

1. (2, 22, 222) = 2 × (1, 11, 111)

2. (3, 33, 333) = 3 × (1, 11, 111)

3. (1, 11, 111) = 1 × (1, 11, 111)

4) (4, 44, 4444) ≠ 4 × (1, 11, 111)

Thus, option 4 does not follow the pattern mentioned above and it is the odd one out.

Hence, the correct answer is, "(4, 44, 4444)".

The mirror image of the object when a mirror is placed on the right side of the object is shown below,

Hence, the correct answer is, "Option 2".

CONCEPT :

Types of figure generally given in the exams.

The clearly seen alternate position of the open dice becomes the opposite pair after folding and the two remaining faces also become opposite to each other.

Here, In every figure:

A is opposite to C.

B is opposite to D.

Thus the remaining, E is opposite to F.

Important Points

Opposite pair of faces cannot appear in the adjacent faces of the cube when folded. 

EXPLANATION :

In Option 2 

 the star and 5 dots appear at the adjacent places which is not possible to form from the question figure.

Hence, option 2 is the correct answer.

Applying the logic as per the information given in the question, we get

1. 33, 86, 33, 78 → K, P, K, V

2. 14, 58, 22, 56 → H, Y, D, V

3. 30, 42, 32, 77 → K, I, L, T

4. 21, 79, 42, 97 → H, T, I, P

Hence, the correct answer is "30, 42, 32, 77".

Calculation:

Let the number be x which is greater or less than 49 and 95 with same difference

According to the question

x - 49  = 95 - x

⇒ 2x = 144

⇒ x = 72

∴ Number is 72

Shortcut Trick

According to the question we have to find the middle number from 49 to 95, which is the average from 49 to 95

Required number = (49 + 95)/2 = 144/2 = 72

Given:

Tanzeem spent 1/5 of his salary on his friend

1/10 of the salary on accommodation

1/4 of the salary was his saving

The total salary left is Rs. 1800

Formula used:

Monthly salary = Saving + expenditure

Calculation:

Let the total salary of Tanzeem be x

Remaining amount = Total Amount - the amount spent from salary

Remaining amount = x - (1/5 + 1/10 + 1/4)x = 9x/20

So, 9x/20 = 1800

⇒ x = 4000

∴ Total expenditure on accommodation and savings = (1/10 + 1/4) × 4000 = Rs 1400

Given:

z + 2/z = 2

Calculation:

z + 2/z = 2

⇒ z² + 2 = 2z

⇒ z² = 2z - 2

Putting z² = 2z - 2 we get,

(2 - 2z + z²) (2 + 2z - z²) = 0 × (2 + 2z - 2z + 2) = 0

∴ Value of the given expression is 0

Calculation:

 $x = \sqrt {20 + \sqrt {20 + \sqrt {20 + \sqrt {20 + \ldots \infty } } } }$

⇒ x = √(20 + x)

Squaring both sides,

⇒ x² = 20 + x

⇒ x² - x - 20 = 0

⇒ x² - 5x + 4x - 20 = 0

⇒ x (x - 5) + 4 (x - 5) = 0

x = 5 as x cannot be negative.

∴ The correct answer is 5

Shortcut Trick

If the given expression is like this $\sqrt {x + \sqrt {x + \sqrt {x + \ldots \infty } } }$

Then try to find its factors, and from the two factors which makes x the greater one will be the answer

Here,

x = 20 can be written as = 5 × 4

In this case, 5 is greater than 4 hence the answer will be 5

∴ Value of x = 5

Shortcut Trick

The point of intersection of perpendicular bisectors of the sides of a triangle is the circum-centre.

Memory Aid for Triangle Centers:

1. Perpendicular Bisectors → Circum-centre (Center of circumcircle)
2. Altitudes → Orthocentre
3. Medians → Centroid
4. Angle Bisectors → In-center (Center of incircle)

∴ The correct answer is circum-centre.

Alternate Method

Given: A triangle with its perpendicular bisectors intersecting at a common point.

Property Used: The circum-centre is the point that is equidistant from all three vertices of the triangle, allowing a circle (the circumcircle) to pass through them.

⇒ A perpendicular bisector is a line that divides a side into two equal parts and meets it at a 90° angle.

⇒ In any triangle, the three perpendicular bisectors are concurrent (they meet at a single point).

⇒ This point of concurrency is called the circum-centre.

⇒ The distance from the circum-centre to any vertex is the circum-radius (R).

∴ The correct answer is circum-centre.

Additional Information

Orthocentre

The point where the three altitudes (perpendiculars drawn from vertices to opposite sides) of a triangle intersect.

Centroid

The point where the three medians (lines connecting vertices to the midpoints of opposite sides) intersect; it divides each median in a 2:1 ratio.

In-center

The point of intersection of the internal angle bisectors; it is the center of the incircle which touches all sides of the triangle.

Euler Line

In any non-equilateral triangle, the orthocentre, centroid, and circum-centre are collinear, and the centroid divides the distance between the other two in a 2:1 ratio.

Given:

 the radius of the circum-circle of an equilateral triangle is 12 cm

Concept used: 

Median of a triangle divide itself in the ratio of 2 ∶ 1 at its centroid and in case of equilateral triangle centroid, circum-centre, in centre, ortho centre all lie at the Centre.

Calculation:

Let the height of the triangle be x

 radius of the circle circumscribing the three vertices of triangle

= (2/3) × x = 12

⇒ x = 18 cm

∴ Height of the triangle is 18 cm

Shortcut Trick

We know, radius of a circumcircle  of an equilateral triangle is a/√3

Where, a be the sides of the triangle.

So, according to the question,

⇒ a/√3 = 12

⇒ a = 12√3 

So, the height of the equilateral triangle is √3/2 × 12√3 = 18 cm

Given:

P = 350 and Q = 600

Calculation: 

Required % = [(600 - 350)/600] × 100 = 41.67%

∴ P is 41.67% less than Q

Given:

The ratio of two numbers is 5 : 4. If the sum of both the numbers is 180

Calculation:

Let the two numbers be 5x and 4x

According to the question,

5x + 4x = 180

⇒ 9x = 180

⇒ x = 20

Smaller number = 4x = 4 × 20 = 80

∴ the smaller number is 80

Given:

P invest Rs. 35000 for 2 years, Q invest Rs. 21000 for 1 year

Concept used:

• Profit = Investment × Time

Calculation:

According to the question:

P : Q = 35000 × 24 : 21000 × 12 =10: 3

P’s share = (10/13) × 26000 = Rs. 20000

∴ Share of P is Rs. 20,000.

GIVEN:

31x + 31y = 403

FORMULA USED:

Average = sum of numbers/total numbers

CALCULATION:

According to the question,

⇒ 31(x + y) = 403

⇒ x + y = 403/31 =13

So, Average of x + y = 13/2 = 6.5

∴ Average of x and y is 6.5

Calculation:

Let the first part be x and second part be 7500 - x

According to the question,

S.I of x = S.I of (7500 - x)

⇒ (x × 12 × 1)/100 = [(7500 - x) × 18 × 1]/100

⇒ 2x = 3(7500 - x)

⇒ 2x = 22500 - 3x

⇒ 5x = 22500

⇒ x = 22500/5

x = 4500

So, first part is Rs. 4500 and second part is Rs. 3000

Interest on first part = (4500 × 12 × 1)/100 = Rs. 540

∴ The interest on first part is Rs. 540

Given:

Selling price = Rs.13924

Profit = 18 %

Calculation: Let the Cost Price be 100x

⇒ 13924 = 100x × 118/100

⇒ x = 13924/118 = 118

So, the Cost Price of calculator = 100 × 118 = 11800

Now, the Selling price is changed to Rs.10266

Loss % = [(11800 - 10266)/11800] × 100 = 13%

∴ Loss percentage is 13.

Shortcut Trick

Cost price of the calculator = 13924/118 × 100 = Rs. 11800

Loss percentage = (11800 - 10266)/11800 × 100 = 1534/118 = 13%

Calculation:

Let the Cost Price of the belt be 100x

So to gain 21% profit Selling Price = 121x

According to the question

⇒ 121x = Marked Price × (55/100)

⇒ Marked Price = 121x × (100/55) = Rs.220x

For Cost Price = 100x, the Marked Price was 220x

Marked up difference = 220x - 100x = 120x

∴ the marked price is marked up by 120%

Shortcut Trick

Let cost price be Rs. 100

⇒ Marked price = (100 × 121)/55 = Rs. 220

⇒ Desired percentage = (220 - 100)/100 × 100 = 120%

Calculation:

√(513 - √144 - √81 -√64)

⇒ √(513 - 12 - 9 - 8)

⇒ √(513 - 29)

⇒ √484 = 22

∴ the value is 22

Calculation:

Let the capacity of the tank = 72 litres

Efficiency of pipe P = 72/24 = 3 litres/hour

Efficiency of pipe Q = 72/18 = 4 litres/hour

According to the question,

Total time in which tank has filled = 15 hours

Let the pipe P was closed at after n hours

According to the question

⇒ 3 × (n) + 4 × 15 = 72

⇒ 3n + 60 = 72

⇒ 3n = 12

⇒ n = 4

So, 4 hours after 11:00 am. that means 3:00 pm

∴ the tap P should be closed at 3 : 00 pm

Confusion Points

Not asking about after how many hours the tap should be stopped. It is asking about the time (in p.m.) when the tap will be stopped. [Which is mentioned in the question]

Start at 11 a.m + 4 hours = 3 p.m

Shortcut Trick Formula used:

Required distance is given by

$D=\frac{S_1× S_2}{S_1-S_2}× (t_1-t_2)$

Whichever is greater can be taken first from S₁ and S₂ same for t₁

and t₂ greater one is taken first in subtraction

Calculation:

Let the correct time be 't'

⇒ D = $\frac{(4× 5)}{(5-4)}×\frac{(t+6)-(t-6)}{60}$   (∵ 1 min = 1/60 hr)

⇒ D = 20 × 12/60 = 4

∴ The required distance is 4 Km.

Alternate MethodLet the distance between school from house is D

Actual time at which he must have reached school = t in minutes

According to the question,

4 = D/(t + 6)

⇒ D = 4 (t + 6)      ----(i)

And,

⇒ D = 5(t - 6)      ----(ii)

From eq. (i) and (ii)

4t + 24 = 5t - 30

t = 54 minutes

Distance, D = [4 × (54 + 6)]/60 = 4 km

∴ The required distance is 4 Km.

Given:

Students Passed with Distinction

2012 = 7000

2013 = 1500

2014 = 3500

2015 = 6500

Calculation:

In 2011 students passed with Distinction = 2000

In 2012 Distinction students increased from 2011.

In 2013 Distinction students decreased from 2012.

In 2014 Distinction students increased from 2013.

In 2015 Distinction students increased from 2014.

∴ The number of students who passed with distinction decreased in 2013.

Number of passed students in 2014 = 3500

Number of passed students in 2017 = 6500

∴ Difference in the number of students who passed with distinction between the years 2017 and 2014 = 6500 - 3500 = 3000

Number of passed students in 2012 = 7000

Number of passed students in 2011 = 2000

∴ Required % = [7000 - 2000)/2000] × 100 = 250%

Total students passed in last three years i.e. in 2015, 2016 and 2017 = 6500 + 2500 + 6500 = 15500

∴ Number of certificate provided will be 15500.

Given:

Length of rectangle = 24 cm

Breadth of rectangle = 7 cm

Concept used:

• Diagonal² = Leangth² + Breadth²

Calculation:

Length of diagonal = √(24² + 7²) = √(576 + 49) = √625 = 25 cm

∴ Diagonal of the rectangle is 25 cm

Given:

The radius of a circle is 10.5 cm

Concept used:  

Circumference of circle = 2πr, where r = radius

Calculation: 

⇒ Circumference = 2 × (22/7) × 10.5 = 66 cm

∴ Circumference (in cm) of a circle is 66 cm.

Given:

Diameter of cylinder = 42 cm, r = D/2 = 42/2 = 21 cm, height of cylinder = 14 cm

Concept used:  

Total Surface area of cylinder = 2πr(r + h)

Calculation:    

Total Surface area of cylinder = 2 × (22/7) × 21 × 35 = 4620 cm²

∴ Total surface area (in cm²) of a right circular cylinder = 4620 cm²

Concept used:  

• sin30° = 1/2

Calculation:

⇒ (2 - sin30°)

⇒ 2 - 1/2 

⇒ 3/2

∴ The correct answer is 3/2

Calculation:

Pythagoras theorem

QR² = PR² - PQ²

⇒ QR² = 169 - 25

⇒ QR = √144 = 12 cm

∴ Cosec R = PR/PQ = 13/5

Key Points

In a right angle triangle base and height change according to the acute angle.

The opposite side of an acute angle is always considered as the height of the right angle triangle.

The correct answer is makes the monetary policies less effective.

Key PointsBlack Money 

• In India, money earned through illegal means is called black money or in other terms can be said more money is earned than the tax limit but tax is not paid.
• Even if they pay taxes, the taxes are not in the correct proportion of their income.
• The illegal activities that can lead to black money generation are crime, corruption, non-compliance with tax requirements, complex procedural regulations, money laundering, and smuggling.

Parallel Economy:

• The parallel economy is the functioning of an unsanctioned sector in the economy whose objectives run opposite to the objectives of the official, sanctioned, or legitimate sector. The parallel economy has political, commercial, legal, industrial, social, and ethical aspects.
• The prevalence of black money gives rise to a parallel economy. The term parallel economy is also referred to as black economy, unaccounted economy, illegal economy, subterranean economy, or unsanctioned economy.

Important PointsImpacts of Parallel Economy

• The parallel or black economy creates hindrances in the effective implementation of monetary policies. This results in unexpected outcomes and it becomes difficult for the institutions to take the right corrective measures in the economy.
• Cryptocurrency and unrecorded cash transactions in e-commerce are two new ways for unfriendly elements in the country to obtain resources.
• Organized crime is on the rise in India, particularly in metro centers like Mumbai and Delhi, because to a thriving parallel economy.
• The parallel economy is the greatest source of financial help to extremists.
• There have recently been allegations of illicit firearms being seized and public firing by persons. In India, black money is a common source of the illegal arms trade.

'GaribiHatao’ (removal of poverty) was the main objective of the Fifth five-year plan(1974-79), and ’Growth with Stability’ was the main objectives of Fourth Five Year Plan (1969-1974). It was launched by Indira Gandhi government. The aim of this five-year plan was to increase national income by 5.5 per cent. It aimed at creating economic stability and achieve social justice with equality.

• "Dhamek Stupa" is located at Sarnath, near Varanasi in Uttar Pradesh, India.
• It was built by Emperor Ashoka.
• It is cylindrical in shape and made up of red bricks and stones.
• It marks up the place where Lord Buddha preached his first sermon.

• Non-cooperation Movement was conducted from September 1920 to February 1922. It was initiated by Gandhi after the Jallianwala Bagh Massacre.
• People started protesting with Non-Ahimsa and at the same time boycotted British goods. After the Chauri-Chaura incident, Gandhi withdrew the movement.
• https://knowindia.gov.in/culture-and-heritage/freedom-struggle/the-non-cooperation-movement.php

The correct answer is Mexico

Key Points

• The countries through which the Equator passes are Ecuador, Colombia, Brazil, Sao Tome & Principe, Gabon, Republic of the Congo, Democratic Republic of the Congo, Uganda, Kenya, Somalia, Maldives, Indonesia and Kiribati.
• Thus, the Equator does not pass through Mexico.
• The equator is an imaginary line around the middle of the earth. It is halfway between the North Pole and the South Pole, at 0 degrees latitude. It divides the earth into a Northern Hemisphere and a Southern Hemisphere. Please note that the Earth is widest at its Equator.

The correct answer is  Manipur

Key Points

• The capital of Arunachal Pradesh is Itanagar.
• The domestic borders of Arunachal Pradesh include Assam and Nagaland.
• Manipur does not touch the boundary with Arunachal Pradesh.
• While the international borders of Arunachal Pradesh include: Bhutan, Myanmar and China.

The correct answer is Dance.

Key Points

• Achchhan Maharaj whose original name was Jagannath Maharaj is associated with Dance.
• He was a great Kathak Dancer of Lucknow Gharana.
• He was the father and guru of Pt. Birju Maharaj.
• In the loving memory of Achchhan Maharaj, a two-day live dance and music were inaugurated in New Delhi in January 2018 in presence of Pt. Birju Maharaj.

In December 2017 Russia has signed an agreement with Sudan to build a nuclear power plant in the nation in order to produce electricity. The Russian State Corporation for Atomic Energy has signed this agreement. It will allow Sudan to tackle energy security problem.

O.P. Jindal University has been ranked at the top in the Swachhta Ranking 2017 released by the Union Government. The award ceremony was held in New Delhi and Union HRD Minister, Shri Prakash Javadekar distributed the awards. Among 3500 institutes which participated in it, 25 institutes were given prizes in different categories.

The correct answer is 147181.

Key Points

• The area of Nepal is approximately 147181 square kilometres.
• It is bordered by India and Tibet (China). Its capital is Kathmandu and its currency is the Nepalese rupee.
• Nepal is a land-locked country with Bidhya Devi Bhandari as President.

The correct answer is Argon.

Key Points

• Argon has all filled orbitals as well as a filled valence shell.
• As a result, it doesn’t want to lose or gain any electrons.
• Hence, argon has the lowest electron affinity.

Important Points

• Electron affinity is the change in energy of a neutral atom (gaseous phase) when an electron is added to the atom to form a negative ion.
• Electron affinity increases from left to right in the Periodic Table.
• Electron affinity decreases down the groups.
• The electronic affinity of the Noble gases, Alkali metals, and Alkali earth metals are close to zero.

Additional Information

Fluorine

• Atomic number: 9.
• Symbol: F.
• Most electronegative element.
• First isolated by Henri Moissan.

Bromine

• Atomic number: 35.
• Symbol: Br.
• It is the third-lightest halogen and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas.
• Its properties are thus intermediate between those of chlorine and iodine.

Chlorine

• Atomic number 17.
• Symbol Cl.
• Discovered by Carl Wilhelm Scheele.
• Second-lightest of the halogens.

I. They change the colour of red litmus to blue. - Incorrect

II. They change the colour of blue litmus to red. - Correct 

III. They have pH value less than 7. - Correct

Concept:

ACID:

• It is an ion or a molecule that is capable of donating a hydrogen ion i.e. proton.
• It has a sour taste.
• It is corrosive in nature.
• it changes the colour of litmus, from blue to red.
• Its name come from the Latin word "acidus". which means  "sour" and refers to the sour taste of many acids.
• Its ph value range is between 1 to 7.
• example: HCL, H2SO4 etc

BASE:

• ​The base gives off hydroxyl ion when dissolved in water.
• it changes red litmus paper to blue
• It has a bitter taste
• Its pH value range is between 7 to 14.
• Example: NaOH, KOH etc.

Indicator:

• It is something that gives information or shows a sign.
• Examples of Indicators of acid and base are:
• Litmus paper
• Methyl orange
• Phenolphthalein.

Explanation:

Additional Information

The correct answer is President of India.

Key PointsArticle 151 - Audit reports

• CAG submits audit reports relating the accounts of the Centre to the president, who shall, in turn, place them before both Houses of Parliament, similar
• CAG submits audit reports relating the accounts of the state to the governor, who shall, in turn, place them before the state legislature.

Important Points

• The Constitution of India ( Article 148 ) Provides an independent office of the Comptroller and Audit General of India ( CAG ). He is the head of the Indian Audit and Accounts Department.
• Article 148 - Comptroller and Auditor General of India
• He holds office for a period of six years or up to the age of 65 years (whichever is earlier).
• Appointed  by – The President
• Salaries/allowance  - Second Schedule
• Removal – similar to Supreme Court Judge
• Further office -  Not Eligible after Retirement
• Administrative Expenses – Charged upon Consolidated Fund of India
• Article 149 – Authorises the Parliament to prescribe the duties and powers of the Comptroller and Auditor General in relation to the accounts of the Union and the states and any other authority or body.
• Article 150 - Form of accounts of the Union and the states.
• CAG advises the President about prescriptions in which the accounts of the Centre and the states shall be kept.

The correct answer is 52th Constitutional Amendment Act.

Key Points

• Anti-defection Law was passed in 52^th Constitutional Amendment Act.
• A new schedule, the 10^th Schedule was added to the Indian Constitution.
• According to this law, the legislators may be disqualified on account of defection.
• The Anti-defection law was passed by Parliament in 1985 and reinforced in 2002.
• The 10th Schedule of the Indian Constitution popularly referred to as the ‘Anti-Defection Law’ was inserted by the 52nd Amendment (1985) to the Constitution.
• ‘Defection’ has been defined as, “To abandon a position or association, often to join an opposing group”.
• The anti-defection law was enacted to ensure that a party member does not violate the mandate of the party and in case he does so, he will lose his membership in the House.  The law applies to both Parliament and state assemblies.
• The Anti-Defection Law aims to prevent MPs from switching political parties for any personal motive.

Additional Information The Tenth Schedule includes the following provisions with regard to the disqualification of MPs and MLAs on the grounds of defection:

Grounds for disqualification:

• If an elected member gives up his membership in a political party voluntarily.
• If he votes or abstains from voting in the House, contrary to any direction issued by his political party.
• If any member who is independently elected joins any party.
• If any nominated member joins any political party after the end of 6 months.
• The decision on disqualification questions on the ground of defection is referred to the Speaker or the Chairman of the House, and his/her decision is final.
• All proceedings in relation to disqualification under this Schedule are considered to be proceedings in Parliament or the Legislature of a state as is the case.

Key Points

• Stomata are the pores on the plant skin.
• They help in the exchange of carbon dioxide and oxygen.
• Guard cells help stomata to open and close.
• Also, plant closes stomata when it does not need carbon dioxide for photosynthesis to prevent water loss.

​

The correct answer is Iungs.

Key Points

• AIveoIi, balloon-like structures are tiny air sacs within the lungs.
• The respiratory system comes into direct contact with the circulatory system through them.
• They pass carbon dioxide in the blood to the lungs while oxygen in the lungs is passed into the blood.
• The site of gaseous exchange in the lungs is Alveoli.
• The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.
• Oxygen breathed in from the air passes through the alveoli and into the blood and travels to the tissues throughout the body.

Additional InformationKidney-

• Located: in the abdomen, just below the rib cage, one on each side of your spine.
• Shape: bean shape
• Measurement: 12 × 6 × 3
• Weight of each kidney
• Male- 125 to 170 gram
• Female- 115 to 155 grams
• A nephron is the structural and functional unit of the kidney.

liver-

• The liver is the largest gland of the human body. It performs the function of detoxification of harmful substances in the body
• For example, it converts harmful ammonia into urea,  It also breaks down alcohol and other such substances in the blood.
• The liver has phagocytic cells that eliminate dead blood cells & bacteria from the blood, they are called the Kupffer cells
• Kupffer cells are also known as stellate macrophages. They are located in the lumen of liver sinusoids attached to their endothelial cells.

heart-

• The heart is the muscular pumping organ that pushes the blood around the body.
• Blood transports carbon dioxide to the lungs for oxygen from the cells for removal and carries oxygen from the lungs to the heart and the heart pumps the blood to all the cells of the body.
  
• A typical heart has two upper and two lower chambers.
• The upper chambers, the right, and left atria receive incoming blood.
• The lower chambers, the more muscular right and left ventricles pump blood out of the heart.

The correct answer is Kisan.

Key Points

• The SAMPADA (Scheme for Agro-Marine Processing Development of Agro-processing Clusters) scheme has been renamed to 'PMKSY'.
• PMKSY is the abbreviation of Pradhan Mantri Kisan Sampada Yojana.
• It is a Central Sector Scheme. Its aim is to supplement agriculture, modernize processing and decrease Agri-Waste.
• Pradhan Mantri Krishi Sinchayee Yojana (PMKSY) is a scheme launched by Prime Minister Narendra Modi at the Cabinet Committee on Economic Affairs in July 2015.
• This scheme aims at ensuring assured irrigation and efficient use of water for cultivation.

Important PointsIt incorporates the following schemes:

• Accelerated Irrigation Benefit Programme (AIBP) of the Ministry of Water Resources, River Development & Ganga Rejuvenation (MoWR, RD&GR),
• Integrated Watershed Management Programme (IWMP) of the Department of Land Resources (DoLR), Ministry of Rural Development (MoRD) and
• On Farm Water Management (OFWM) component of the National Mission on Sustainable Agriculture (NMSA) of the Department of Agriculture and Cooperation (DAC).

China is the second country in the world after France to construct a photovoltaic highway. Solar panels are used for its construction and in order to protect the panels they are provided with a thin sheet of transparent concrete on top of them. One of the advantage of this type of highway is that the electric vehicles (EVs) can be charged using wireless systems.

The correct answer is 99.

Key Points

• As per a report released by RBI in August 2017,99 percent of the demonetised currency returned to the Central
• \ Bank.
• It constitutes about ₹ 15.28 lakh crore.
• The cash which was not returned amounts to ₹ 16,000 crore i.e. 1.04% of the value of old notes.

Important PointsReserve Bank of India (RBI)

• The Reserve Bank of India (RBI) is India’s apex central banking institution.
• Established: April 1, 1935, under RBI act 1934.
• It was formed on the recommendation of the Hilton Young Commission.
• Initial Paid-up capital was 5 crores.
• RBI was nationalized on 1 January 1949.
• The Central Office of the Reserve Bank was initially established in Calcutta but was permanently moved to Mumbai in 1937.

The correct answer is Intelligence.

Key Points

• FIU stands for Financial Intelligence Unit of India.
• The FIU - IND was set by the Government of India in 2004 as the central national agency responsible for receiving, processing, analyzing and disseminating information relating to suspect financial transactions.
• It is an independent body, headed by Director, reporting to the Economic Intelligence Council (EIC) headed by the Finance Minister.
• For administrative purposes, FIU-IND is under the Department of Revenue, Ministry of Finance.
• FIU-IND is established as an administrative FIU i.e., as an independent government body that receives analyses and disseminates suspicious transactions to the appropriate law enforcement or investigation agency.