SSC CHSL Previous Paper 15 (Held On: 10 March 2018 Shift 3) (Previous Year Paper)

The correct answer is '3' i.e. error lies in the third part of the sentence.

Key Points

In the third part of the sentence, the usage of 'improving' is incorrect Instead, use 'improve'

• According to grammar, whenever we use the helping verb do/does/did we always use the first form of the verb as the main verb.
• Let's see an example-
• I did not know Jamie had a knife.

So the correct sentence is- Although he studied regularly, his marks didn't improve.

The correct answer is '3' i.e. error lies in the third part of the sentence.

Key Points

In part 3 of the sentence, the usage of 'declines' is incorrect Instead use 'declined'

• According to grammar, Whenever the whole sentence is in the past tense then write every verb in the past simple tense.
• Let's see an example-
• He offered the boys some coffee instantly they declined politely.

So the correct sentence is- Buddhism originated in Ancient India around the 6^th and 4^th centuries BC, from where it spread through most of Asia, and then it declined in India during the Middle Ages.

The correct answer is 'Artificial'

Key Points

• Let's see the meanings of the given words-
• Artificial→ means 'made as a copy of something natural.'
• Daydream→ A series of pleasant thoughts that distract one's attention from the present.
• Unreal→ means 'not seeming real'
• Vulnerable→ Exposed to the risk of being.
• So according to the meaning, the correct answer is 'Artificial'. Also, in the blank, we need to add an adjective that is opposite of the word written before the blank.

The correct answer is 'deeds'

Key Points

• Let's see the meanings of the given words-
• Steeds→ mean 'A horse'
• Bleed→ means 'lose blood from the body as a result of injury or illness.'
• Gleeds→ mean 'great delight'
• Deeds→ mean 'a conscious or intentional action'
• So according to the meanings of the given words, the correct answer is 'deeds' as it is suitable in the given context.

The correct answer is 'Brief'

Key Points

• Let's see the meanings of the given words-
• Laconic→ means 'someone who uses very few words.'
• Verbose→ means 'using or expressing in more words than are needed.'
• Unabridged→ means 'full length; complete; unreduced.'
• Lengthy→ means 'of considerable or unusual duration.'
• Hence, according to the meaning, the correct answer is 'Brief'

The correct answer is 'Hopeful'

Key Points

• Let's see the meanings of the given words-
• Propitious→ means 'giving or indicating a good chance of success; favourable.'
• Luxurious→ means 'characterized by luxury'
• Sad→ Feeling sorrow; unhappy.
• Hopeful→ feeling or inspiring hope.
• Hence, according to the meanings of the given words, the correct answer is 'Hopeful'

The correct answer is 'hard'

Key Points

• Let's see the meanings of the given answer-
• Mellow→ means 'pleasantly smooth or soft'
• Ripe→ means 'ready for harvesting and eating'
• Rich→ means 'having a great deal of money or assets.'
• Hard→ means 'solid firm or rigid'
• Hence, according to the meanings of the given words, the correct answer is 'Hard'

The correct answer is 'Hide'

Key Points

• Let's see the meanings of the given words-
• Exhume→ dig out (something buried, especially a corpse) from the ground; extract; reveal.
• Resurrect→ revive or revitalize (something that is inactive, disused, or forgotten).
• Hide→ means 'put or keep out of sight'
• Resurrect→ means 'restore to life'
• Hence, according to the meaning of the given words, the correct answer is 'Hide'

The correct answer is 'PQR'

Key Points

• As the sentence begins with the prepositional phrase 'for ages', we need a noun so the sentence has a subject.
• The subject is found in  'P' i.e. 'the Indian psyche'.
• V3 form of the verb will follow the verb 'has been', as the sentence is in passive voice. Therefore, Q will come after P.
• R (to the welfare of all) comes last as it ties the sentence in a meaningful manner.
• So the correct sequence is 'PQR' and Option 1 is the correct answer.

Correct sentence  - For ages, the Indian psyche has been geared towards devoting one's life to the welfare of all.

The correct answer is 'This essay has been written by my cousin'

Key Points

• While changing the Active voice into the passive voice we need to follow the given steps-
• Firstly, recognize the verb of the sentence or the tense of the sentence because in the passive voice we don't change the tense.
• Secondly, recognize whether the sentence has an object.
• Thirdly, if the object is not written then see whether the sentence has an infinitive phrase if yes, then make the passive voice of an infinitive phrase.
• So in the given sentence, the object is 'this essay' and the verb is the present perfect tense so in the passive the tense will remain the same.
• So the correct answer is 'Option 1'

The correct answer is 'The lady asked whether he knew the way to home'

Key Points

• We have to keep the following steps in mind while changing the direct speech into indirect speech.
• Firstly, look at the sentence type the given is an interrogative sentence because after the reported speech there is a question mark. If the sentence is an interrogative sentence then, we have to write if/whether.
• Secondly, check for the tense of the sentence the given sentence is in the present tense hence it will change into the past tense.
• Thirdly, check for the pronouns in the sentence.
• So following these steps, the indirect speech of the given sentence is- The lady asked whether he knew the way to home.

The correct answer is 'Foreign'

Key Points

• The correct spelling is 'Foreign'
• The meaning of the given word is 'Characteristics of a country or language other than one's own.'
• It is an adjective, the noun form of this word is 'foreignness'

The correct answer is 'saying'

Key Points

• In the given blank, we need a noun because before the blank an adjective is mentioned which is 'proverbial' hence we need a noun that is going to be followed by this adjective.
• 'Say' is a verb and 'Said' is a verb too.
• 'Saying' is a verb as well as it acts as a gerund and we know that gerund acts as a noun. So it is going to be the correct answer.

The correct answer is 'this'

Key Points

• In the given blank, we need a pronoun for the noun 'destiny' also this noun is in a singular form hence we need a singular pronoun.
• So, 'these' and 'those' are eliminated because these two are in plural form.
• 'Here' is an adverb of a place that is grammatically incorrect hence the correct answer is 'this'

The correct answer is 'Or'

Key Points

• Before the blank, 'wise' is mentioned and after the blank we can see the opposite of 'wise' is mentioned hence to connect these two words we need a coordinate conjunction that is 'or' So the correct answer is Option 1.

The correct answer is 'from'

Key Points

• The meaning of the preposition 'from' is 'indicating source or provenance'
• Let's see an example-
• He appealed for information from anyone who saw the attackers.

So the correct sentence is- That he receives from the hand of providence.

The correct answer is 'himself'

Key Points

• In the given blank we need a reflexive pronoun.
• As we can see the options 'he' is a subjective case and 'his' is a possessive pronoun.
• 'Him' is an objective case. So these options are eliminated.
• 'himself' is a reflexive pronoun which is the correct answer.

So the correct blank is-  So accommodate himself to it, that he

The correct answer is 'to happen in the way you had hoped'

Key Points

• The meaning of the given idiom 'come true' is 'to happen in fulfillment of an expectation, prediction, wish, etc.; become a realized fact'
• Let's see an example-
• Many of his predictions are coming true.

The correct answer is 'said when two people have the same opinion or make the same choice'

Key Points

• The meaning of the given idiom 'great minds think alike' is 'said when two people have the same opinion or make the same choice'
• Let's see an example-
• Tom and I both brought the same gift to Sarah's party. Great minds think alike, I guess.

The correct answer is 'exigency'

Key Points

• Let's see the meanings of the given words-
• Vindication →clearing someone of blame or suspicion.
• Satiety→ satisfaction.
• Redress→ to correct.
• Exigency→ As urgent need or demand
• Hence, according to the meaning of the given words, the correct answer is 'exigency'

The correct answer is 'adhere'

Key Points

• Let's see the meaning of the given words-
• Atheist → someone who doesn't believe in god.
• Pagan →a person holding religious beliefs other than those of the main world religions.
• Agnostic → a person who believes that nothing is known or can be known of the existence or nature of God.
• Adhere→ Stick fast to or believe in and follow the practices of.
• So according to the meaning of the given words, the correct answer is 'Adhere'

The correct answer is 'are mired'

Key Points

• According to the grammar, whenever we have 'adjectives/nouns/verbs' connected with the coordinate conjunction 'and' then we have to follow the parallelism.
• In the given sentence, 'have' is connected with the coordinate conjunction hence at the other side of the conjunction we need to use the plural form of the helping verb which is 'are'.
• Also, if we have two different things happening in the sentence and they are connected with the conjunction 'and' then, we have to use different verbs.
• In the given sentence, two things are happening which is 'we have lost the magic of living' and the other thing is 'is mired in the numbers' as they both are different hence we have used different verbs for the subject 'we'

So the correct sentence is- We have lost the magic of living, and are mired in numbers.

The correct answer is 'has fascinated'

Key Points

• According to grammar, 'that' is a relative pronoun whenever we have a relative pronoun we use the verb according to the antecedent of the pronoun here in the given sentence the antecedent is 'journey' hence we need a singular verb for this.

So the correct sentence is- There is something in a train journey that has fascinated a lot of people and I am one of them.

The correct answer is 'ACB' 

Key Points

• If we read the last word of the fixed sentence we get to know that it is a pronoun 'we' that acts as a subject of the sentence because 'on the speech front' is a prepositional phrase that has no effect on the verb.
• So the verb is given in part A of the sentence i.e. 'can' and the second sentence would be 'c' because it will act as a subordinate clause and the main clause will start from the 'we'

So the correct sentence is- On the speech front, we can all do something individually if we change our idiom of communication.

The correct answer is 'Monopoly'

Key Points

• The correct spelling is 'Monopoly'
• The meaning of the given word is- The exclusive possession or control of the supply of or trade in a commodity or service.
• Thus, the marked option is correct and therefore the answer.

​ 

Additional Information

Let's look at the meaning of the other option-

• The correct spelling of the word is 'Illiterate' - It refers to a person who is unable to read or write. It can also imply a lack of education or knowledge in general or in a specific subject.

Given → Square : Four

The relation between Square and four is that Square has four sides.

Table shown below shows the shapes with the correct number of their sides:-

Similarly, Rectangle has four sides.

As can be seen clearly that all the other shapes except Rectangle are not given with the correct number of sides in the options.

Hence, the correct answer is "Rectangle : Four".

The pattern followed here is,

18 – 7 = 11

Similarly,

36 – 7 = 29

Thus, the related number pair is 36 : 29.

The pattern followed here is,

Thus, the correct answer is “JRS”.

The correct answer is Nose.

All are internal organs of the human body except the Nose.

Hence, the correct answer is 'Nose'.

The pattern followed here is,

1. 13 × 2 = 26

2. 15 × 2 = 30

3. 17 × 2 = 34

4) 19 × 2 = 38 (31)

Hence, the correct answer is "19 - 31".

The pattern followed here is,

1. T – 3 = Q, Q – 3 = N, N – 3 = K

2) U – 3 = R, R – 3 = O (N), O (N) – 3 = L (M)

3. V – 3 = S, S – 3 = P, P – 3 = M

4. L – 3 = I, I – 3 = F, F – 3 = C

Hence, the odd one is ‘URNM’.

The correct order of the given words as they would appear in an English dictionary is shown as follows:-

2. Alert
3. Assistant
4. Assume
5. Attach
6. Attempt

Hence, the correct answer is “24531”.

The pattern followed here is:-

Hence, the correct answer is "103".

The pattern followed here is:-

As can be seen clearly UH is the missing term.

Hence, the correct answer is "UH"

Given:-

Position of Mohini from the left end → 23^rd

Position of Mohini from the right end → 37^th

Total number of person in the row → (Position of a person from the left end + position of a person from the right end) - 1

Total number of girls in the row → (23 + 37) - 1

Total number of girls in the row → 60 - 1 = 59

Hence, the correct answer is "59".

Given word → GRANDFATHER

1. RAND → GRANDFATHER (so, the word can be formed as all the letters are present)

2. AND → GRANDFATHER (so, the word can be formed as all the letters are present)

3. GRADE → GRANDFATHER (so, the word can be formed as all the letters are present)

4. FAITH → GRANDFATHER (so, the word 'FAITH' cannot be formed as the letter 'I' is missing in the given word)

As can be seen clearly from the above that the word FAITH cannot be formed. 

Hence, the correct answer is "FAITH".

The logic followed here is:-

Sum of the positional value of all the letters of the word + 1 = Code

1. MUTE is written as 60 as:-

13 + 21 + 20 + 5 → 59 + 1 = 60

2. TYRE is written as 69 as:-

20 + 25 + 18 + 5 → 68 + 1 = 69

Similarly,

3. HYPE is written as 55 as:-

8 + 25 + 16 + 5 = 54 + 1 = 55

Hence, the correct answer is "55".

The pattern followed here is:-

Hence, the correct answer is "JVS".

The pattern followed here is:-

As can be seen clearly, 133 is the missing number.

Hence, the correct answer is "133".

The logic followed here is:-

First number - 4 → Second number

First number - 8 → Third number

1. In 113, 109, 105

113 - 4 = 109

113 - 8 = 105

2. In (142, 137, 133)

142 - 4 = 138 not 137

142 - 8 = 134 not 133

3) (197, 193, 189)

197 - 4 = 193

197 - 8 = 189

4) (162, 158, 154)

162 - 4 = 158

162 - 8 = 154

As can be seen clearly from above that the group i.e. (142, 137, 133) is the odd one out as it doesn't follow the logic.

Hence, the correct answer is "(142, 137, 133)".

Given:-

Equation → 23 × 20 ÷ 35 - 2 + 10

After replacing the given symbols with their code we get:-

New equation → 23 – 20 + 35 × 2 ÷ 10

Now, after applying BODMAS Rule, we get:-

23 – 20 + 35 × 2 ÷ 10

23 - 20 + 35 × 0.2

23 - 20 + 7

23 + 7 - 20

30 - 20 = 10

Hence, the correct answer is "10".

Given Equation → 17 - 20 ÷ 25 × 6 + 10 = 12

Checking the options one by one:-

1) - and +

Now, after interchanging the signs, we get:-

17 + 20 ÷ 25 × 6 - 10 = 12

Now, after applying BODMAS Rule, we get:-

17 + 20 ÷ 25 × 6 - 10 = 12

17 + 0.8 × 6 - 10 = 12

17 + 4.8 - 10 = 12

21.8 - 10 = 12

11.8 ≠ 12

Left hand side is not equal to right hand side.

2) ÷ and ×

Now, after interchanging the signs, we get:-

17 - 20 ×  25 ÷  6 + 10 = 12

Now, after applying BODMAS Rule, we get:-

17 - 20 ×  25 ÷  6 + 10 = 12

17 - 20 × 4.16 + 10 = 12

17 - 83.2 + 10 = 12

17 + 10 - 83.2 = 12

27 - 83.2 = 12

-56.2 ≠ 12

Left hand side is not equal to right hand side.

3) + and ÷

Now, after interchanging the signs, we get:-

17 - 20 + 25 × 6 ÷  10 = 12

Now, after applying BODMAS Rule, we get:-

17 - 20 + 25 × 6 ÷ 10 = 12

17 - 20 + 25 × 0.6 = 12

17 - 20 + 15 = 12

17 + 15 - 20 = 12

32 - 20 = 12

12 = 12

Left hand side is equal to right hand side.

4) × and -

Now, after interchanging the signs, we get:-

17 ×  20 ÷ 25 - 6 + 10 = 12

Now, after applying BODMAS Rule, we get:-

17 ×  20 ÷ 25 - 6 + 10 = 12

17 × 0.8 - 6 + 10 = 12

13.6 - 6 + 10 = 12

13.6 + 10 - 6 = 12

23.6 - 6 = 12

17.6 ≠ 12

Left hand side is not equal to right hand side.

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

The pattern followed here is:-

9 * 4 → 9 + 4 = 13 × 2 → 26

4 * 4 → 4 + 4 = 8 × 2 → 16

3 * 6 → 3 + 6 = 9 × 2 → 18

Similarly,

5 * 2 → 5 + 2 = 7 × 2 → 14

Hence, the correct answer is "14".

The pattern followed here is:-

As can be seen clearly, the term that follows the trend of the given list is PQPQPSPQ.

Hence, the correct answer is "PQPQPSPQ".

Given :-

Two pickup trucks X and Y start from the same place.

1. Truck X travels in East for 15 km.

2. Then turns right and travels 8 km.

3. In the meanwhile truck Y travels 7 km in west.

4. Then 3 km north.

5. Then 2 km west.

6. Then it turns left and travels 11 km.

Distance between Truck Y with respect to Truck X is

As can be seen clearly from above that Truck Y is 24 km away and in west direction with respect to Truck X.

Hence, the correct answer is "24 km West".

The least possible Venn diagram for the given statements is as follows

Conclusions:

I) Some papers are tabloids → Follows (As it is given that all magazines are papers and some tabloids are magazines so, it is definite that some papers are tabloids)

II) Some tabloids are papers → Follows (As it is given that all magazines are papers and some tabloids are magazines so, it is definite that some tabloids are papers)

Hence, the correct answer is "Both conclusions I and II follow".

As per the given information,

Hence, the correct answer is “ABC”.

The correct mirror image of the given figure when a mirror is placed on the line MN is as shown below:-

Hence, the correct answer is "Option 4".

Additional Information

• The mirror always forms the laterally inverted images, i.e. left changes to right and vice-versa.
• The reflection of an object in the water is called its water image.
• The water image of an object in the water is always vertically inverted, i.e. upside changes to downside and vice-versa.
• The water image is the mirror image in case if the mirror is placed horizontally below the object.

Given → Unfolded Cube

When the unfolded cube is folded, the opposite faces of the cube formed are as shown below:-

Checking options one by one:-

Option 1) Cube cannot be formed as the two opposite faces of the cube i.e. Square enclosed in circle

and pair of circles 

are present adjacent to each other.

Option 2) Cube can be formed as no two opposite faces of the cube are present adjacent to each other.

Option 3) Cube can be formed as no two opposite faces of the cube are present adjacent to each other.

Option 4) Cube can be formed as no two opposite faces of the cube are present adjacent to each other.

As can be seen clearly that cube given in option figure 1 cannot be formed.

Hence, the correct answer is "Option 1"

The pattern followed here is:-

A letter is represented first by its row and then by its column.

1. 41 → J; 89 → N; 10 → D; 87 → V (so, the letter cluster formed is JNDV)

2. 32 → D; 96 → S; 13 → K; 69 → S (so. the letter cluster formed is DSKS)

3) 32 → D; 58 → O; 77 → P; 30 → E (so, the word formed is 'DOPE')

4) 34 → C; 96 → S; 32 → D; 57 → R (so, the letter cluster formed is CSDR)

Hence, the correct answer is "32, 58, 77, 30".

Calculation:

√405 - 1/2√80 - √125

⇒ √(81 × 5) - 1/2√(16 × 5) - √(25 × 5)

⇒ 9√5 - 1/2 × 4√5 - 5√5

⇒ 9√5 - 2√5 - 5√5

⇒ 2√5 = 2 × 2.236 = 4.472

∴ The correct answer is 4.472

Calculation:

Let 3 consecutive odd numbers be a, (a + 2) and (a + 4)

a² + (a + 2)² + (a + 4)² = 1595

⇒ a² + a² + 4 + 4a + a² + 16 + 8a = 1595

⇒ 3a² + 12a + 20 = 1595

⇒ 3a² + 12a + 20 – 1595 = 0

⇒ 3a² + 12a – 1575 = 0

⇒ a² + 4a – 525 = 0

⇒ a² + (25 – 21) a – 525 = 0

⇒ a² + 25a – 21a – 525 = 0

⇒ a(a + 25) – 21(a + 25) = 0

⇒ (a + 25) (a – 21) = 0

⇒ a + 25 = 0

⇒ a = -25

⇒ a – 21 = 0

⇒ a = 21

∴ Three consecutive odd no. are a = 21, a + 2 = 23 and a + 4 = 25

Calculation:

$x = \frac{1}{{1; + ;\sqrt 2 }} \times \frac{{1; - ;\sqrt 2 }}{{1; - ;\sqrt 2 }} + \frac{1}{{\sqrt 2 ; + ;\sqrt 3 }} \times \frac{{\sqrt 2 ; - ;\sqrt 3 }}{{\sqrt 2 ; - ;\sqrt 3 }} + \frac{1}{{\sqrt 3 ; + ;2}} \times \frac{{\sqrt 3 ; - ;2}}{{\sqrt 3 ; - ;2}}$

$\Rightarrow x = \frac{{1; - ;\sqrt 2 }}{{1^2 - \left( {\sqrt 2} \right)^2}} + \frac{{\sqrt 2 - ;\sqrt 3 }}{{\left( {\sqrt 2} \right)^2 - \left( {\sqrt 3} \right)^2}} + \frac{{\sqrt 3 - ;2}}{{\left( {\sqrt 3} \right)^2; - ;2^2}}$

$\Rightarrow x = \frac{{1; - ;\sqrt 2 }}{{1; - ;2}} + \frac{{\sqrt 2 ; - ;\sqrt 3 }}{{2; - ;3}} + \frac{{\sqrt 3 ; - ;2}}{{3; - ;4}}$

$\Rightarrow x = -;\frac{{\left( {1; - ;\sqrt 2 } \right)}}{1}-;\frac{{\left( {\sqrt 2 - \sqrt 3 } \right)}}{1}-;\frac{{\left( {\sqrt 3 - 2} \right)}}{1}$

⇒ x = –1 + √2 – √2 + √3– √3 + 2

∴ x = 1

Concept used:

If z + 1/z = k then, z² + 1/z²  = k² - 2

Calculation:

⇒ z = 5 + 2√6

$\Rightarrow \frac{1}{Z} = \frac{1}{{5; + ;2\sqrt 6 }} \times \frac{{5; - ;2\sqrt 6 }}{{5; - ;2\sqrt 6 }}$

$\Rightarrow \frac{1}{Z} = \frac{{5; - ;2\sqrt 6 }}{{5^2 - \left( {2\sqrt 6 } \right)^2}}$

$\Rightarrow \frac{1}{Z} = \frac{{5; - ;2\sqrt 6 }}{{25; - ;24}}$

⇒ 1/Z = 5 – 2√6

⇒ z + 1/z = 5 + 2√6 + 5 – 2√6 = 10

So, from the above concept, if z + 1/z = 10 then

⇒ z² + 1/z² = 10² – 2 = 100 - 2 = 98

∴ The correct answer is 98

Calculation:

PA = PB (Both are the tangents that touches both end of chord from same point.)

∠CPA = ∠CPB (The angle made by common side and tangent is equal because PA = PB)

PC = PC [Because of common side (radius that is extended to point P)]

So, ΔPAC ≅ ΔPBC

∴ All option are correct

OA = OB = AB

Since radius are equal, so triangle AOB is equilateral triangle

∠AOB = 60°

So, ∠ADB = 60/2 = 30°

Given:

U = 450 and V = 585

Calculation:

Required % is

⇒ (V – U)/\U × 100

⇒ (585 – 450)/450 × 100

⇒ 135/450 × 100 

⇒ 30%

∴ The correct answer is 30%

Calculation:

Let two no. are 3a and 7a

⇒ 3a × 7a = 1344

⇒ a² = 64                   

⇒ a = 8

∴ Sum of both numbers = 3a + 7a = 10a = 10 × 8 = 80

Concept used:

Profit = Investment × Time

Calculation:

Let Q invested his money of t months and amount of P and Q are 4a and 7a.

Ratio of profit = P’s capital × time : Q’s capital × time

⇒ 4 : 21 = 4a × 6 : 7a × t

⇒ 4 : 21 = 24 : 7t

⇒ 4/21 = 24/7t

∴ t = 18 months

Calculation:

Total Expenditure = Expenditure of (Pencils + Erasers + Sharpeners)

Total Expenditure = 5 × 3 + 3 × 2 + 3 × 5 = 15 + 6 + 15 = 36

Total Articles = 5 + 3 + 3 = 11

∴ Average expenditure = 36/11 = 3.27

Let P = 100 units

R = 18%/year = 18/100

Effective rate of C.I. for 2 years = 18% + 18% + (18 × 18)/100 = 39.24%

(S.I. + C.I.) of 2 years = 2090

⇒ (100 × 18 × 2 ) /100 + 100 × 39.24/100 = 2090

⇒ (36 + 39.4) units = 2090

⇒ 75.4 units = 2090

⇒ 1 unit = 2090/75.4 

P = 100 units = (2090 / 75.24) × 100  

∴ S.I. of 1 year = [(209000 / 75.24) × 18 × 1]/100 = 500

Given:

C.P of pens = Rs. 20 

Sold one at a profit of 25% 

Sold another at a loss of 25%

Formula Used:

S.P = C.P × (100 + P%)%

S.P = C.P × (100 + L%)%

Where, P% = Profit%

L = Loss%, C.P = Cost Price 

S.P = Selling Price

Calculation:

According to the formula used

S.P. of 1^st pen = 20 × 125%

⇒ S.P. of 1^st pen = 20 × 5/4 = Rs. 25

S.P. of 2^nd pen = 20 × 75%

⇒ S.P. of 2^nd pen = 20 × 3/4 = Rs. 15

Total S.P of two pens = Rs. 25 + Rs. 15 = Rs. 40 

Total C.P of two pens = Rs. 20 × 2 = Rs. 40 

∴ There is no profit and loss.

Shortcut Trick

​We know, 25% = 1/4

According to the question,

One article sold at a profit of 25% so, C.P = 4 and S.P = 5

Another article sold at a loss of 25%, so C.P = 4 and S.P = 3

Then. all-over C.P = (4 + 4) = 8 and S,P = (5 + 3) = 8

Here we see, C.P = S.P, so there is no profit and loss.

Calculation:

Let the C.P is 100 rs. So marked price = 130% of 100 = Rs. 130

C.P. × (100 + profit)/100 = M.P.× (100 - Discount)/100

⇒ 100 × (100 + 13.75)/100 = 130 × (100 - Discount)/100

⇒ 113.75 = 130 × (100 - Discount)/100

⇒ 11375 = 130 × (100 – Discount)

⇒ 11375 = 13000 – 130 × Discount

⇒ 130 × Discount = 13000 – 11375

⇒ 130 × Discount = 13000 – 11375 = 1625

∴ Discount percentage = 1625/130 = 12.5%

Given:

$\sqrt[3]{{1331}}{\rm{}} + {\rm{}}\sqrt {729} - \sqrt[3]{{512}}?$

Calculation:

 $\sqrt[3]{{1331}}{\rm{}} + {\rm{}}\sqrt {729} - \sqrt[3]{{512}}$

⇒ 11 + 27 – 8

⇒ 30

∴ Option 3 is the correct answer.

Concept used:

Total work = Efficiency × Time

Calculation:

Let manish complete the book = a days

So, puneet complete the book = 4a days

Difference of days = 4a – a = 3a = 90 days

⇒ a = 30 days

Time taken by manish = a = 30 days

Time taken by puneet = 4a = 120 days

Let Total work = Lcm of 30 and 120 = 120 units

Efficiency of manish = 120/30 = 4 units/day

Efficiency of punnet = 120/120 = 1 unit/day

Total Efficiency of Puneet and Manish = 4 + 1 = 5 units/day

∴ Total time taken to complete the book = 120/5 = 24 days

Shortcut Trick

We know, Efficiency ∝ 1/time

Time difference (4 - 1) = 3 unit → 90 min

So, time taken by Manish is 4 unit → 90/3 × 4 = 120 days

So, total work is 120 unit

If both of them work together then time taken = 120/(4 + 1) = 24 days

Calculation:

Let total distance between X and Y is a km.

T₁ = Distance/Speed $= \frac{{\frac{3}{7}a}}{3} = \frac{a}{7}$

T₂ = Distance/Speed $= \frac{{\frac{4}{7}a}}{4} = \frac{a}{7}$

T = T₁ + T₂ = a/7 + a/7 = 2a/7

⇒ 12 = 2a/7

∴ a = 42 km

120 is the least no. of people who consumed the drink C.

∴ the answer is C.

∴ Ratio of consumers of energy drink C to consumers of energy drink G = 120 : 280 = 3 : 7

Consumers of drink B are greater than that of drink E by = (280 - 140)/140 × 100 = 140/140 × 100 = 100%

Consumers of drink F = 240

New Consumers of drink F = 240 + 40% of 120 = 240 + 48 = 288

∴ % increase = (288 - 240)/240 × 100 = 4800/240 = 20%

Concept used:

Area of equilateral triangle  = √3/4 × a² 

Where, side of the equilateral triangle is a

Calculation:

Area of equilateral triangle = 25√3

⇒ √3/4 × a² = 25√3

⇒ a² = 100

∴ a = 10 cm

Concept used:

Area of the circle = πr² , where r is the radius,

Calculation:

​Radius is 17.5, then the area of the circle is 

⇒ 22/7× 17.5 × 17.5

⇒ 22 × 2.5 × 17.5 

⇒ 962.5 cm²

∴ The correct answer is 962.5

Concept used:

Total Surface area of Cone = πr(l + r)

Calculation:

⇒ 22/7 × 21/2× (11 + 21/2)

⇒11 × 3 × 43/2 = 33 × 21.5

⇒ 709.5 cm²

∴ The correct answer is 709.5 cm2

Concept used:

Calculation:

(cosec 45° + √3/2) = √2 + √3/2 = (2√2 + √3)/2

tan A = 15/8 = BC/AB

⇒ 15/8 = BC/0.8

⇒ BC = 1.5 cm

By Pythagoras Theorem,

AC² = AB² + BC²

⇒ AC² = (0.8)² + (1.5)² = 0.64 + 2.25

⇒ AC² = 2.89

∴ AC = 1.7 cm

• "Residex Index" is associated with Housing Prices. It was launched in 2007 by the National Housing Bank (NHB).
• Its purpose is to provide an index of residential prices in India across cities and over time.

• For sustaining Five-Year Plans, internal financing is done through taxation, public borrowing and deficit financing.
• Public borrowing through the issue of government bonds, funds accumulated through small saving schemes, direct and indirect taxation, and deficit financing are the viable options for internal financing.
• Hence, the correct answer is taxation, public borrowing and deficit financing.

• Buddhist literary works generally written in Pali. It was a language that was spoken in Magadha and South Bihar.
• The Buddhist literature consists of “Tripitakas”. They are: 1. Vinaya Pitaka, 2. Sutta Pitaka, 3. Abhidhamma Pitaka

The correct answer is Baghera Rebellion.

Key Points

• Baghera Rebellion is not associated with the area of Bengal.

The correct answer is Singapore.

Key Points

• Among the given cities, Singapore is closest to the equator.
• Singapore is 200 km north of the equator.

Additional Information

• Some other cities which lie closest to the equator
• Quito, Ecuador
• Kampala, Uganda
• Pekanbaru, Indonesia
• Padang, Indonesia
• Libreville, Gabon
• Pontianak, Indonesia
• Kisumu, Kenya
• Macapa, Brazil
• Mbandaka, Dem. Republic of Congo
• Manta, Ecuador
• Kismayo, Somalia
• Entebbe, Uganda
• Nuevo Loja, Ecuador
• Sao Tome, Sao Tome

The correct answer is Nagaland.

Key Points

• Nagaland does not border Mizoram. The domestic bordering states of Mizoram are Manipur, Assam, and Tripura.
• Mizoram lies in the northeastern part of India.
• Its capital city is "Aizawl".
• While the international borders of Mizoram are Bangladesh and Myanmar.
• ​

The correct answer is Jhaveri sisters.

Key Points

• Jhaveri sisters are related to Manipuri Dance
• Manipuri:
• ​It is the indigenous dance of the people of Manipur.
• It is influenced by Vaishnavism.
• Radha Krishna's love is shown by the performance of the artists.
• Patronage: King Bhagya Chandra & Kriti Chandra.
• Lai Haroba is considered the primary phase of this dance.
• Absence of sensual aspect.
• Features:
• Colorful decoration.
• The lightness of dancing foot.
• The delicacy of drama.
• Lifting music & poetic charm.
• Main musical instrument: Pung or the Manipuri classical drum.

Additional Information

• The first BIMSTEC Disaster Management Exercise 2017 (BIMSTEC DMEx 2017) was held in New Delhi in October 2017.
• BIMSTEC stands for ‘Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation’.
• The member countries are: Bangladesh, Bhutan, India, Myanmar, Nepal, Sri Lanka and Thailand.

The correct answer is Prakash Padukone.

Key Points

• Prakash Padukone is the recipient of the first Lifetime Achievement award initiated by the Badminton Association of India.
• The award will include a cash award of Rs. 10 lahks and a citation.
• He is the only Indian male player to reach World No 1 ranking.
• He belongs from Karnataka.
• He was awarded Arjuna Award in 1972 and Padma Shri in 1982.

Important PointsBadminton:

• Badminton was introduced in India in a version called Poona.
• British army officers learned the game in about 1870.
• In 1873 the duke of Beaufort introduced the sport at his country estate, Badminton, from which the game derives its name.

Modern Badminton:

• It is played as a single or doubles event
• It is played with the help of a racquet and a shuttle.
• The winner is chosen by points and the number of sets won.

The correct answer is Buddhism.

Key Points

• Buddhism is a major religion followed in Sri Lanka, with 70.2% of the population identifying as Buddhist
• The main form of Buddhism practiced in Sri Lanka is Theravada Buddhism.

Other Religion population in Sri Lanka-

Important Points

• Sri Lanka is an island country in South Asia.
• It was formerly known as Ceylon.
• The Democratic Socialist Republic of Sri Lanka is the official name of Sri Lanka.
• Sri Jayawardenepura Kotte is the legislative capital of Sri Lanka.
• Colombo is the executive and judicial capital of Sri Lanka.
• It is the largest city in Sri Lanka by population.

The correct answer is 18 u.

Key Points

• The relative molecular mass of water (H2O) is 18.
• The relative molecular mass is unitless.
• How to find relative molecular mass?​

1. Determine the chemical formula of the molecule.
2. Use the Periodic Table to determine the atomic mass of each element.
3. Multiply the atomic mass by the number of atoms of each element in the molecule.
4. Add the values to get the relative molecular mass.

• The relative molecular mass of water:-
• The formula for water is H2O. Each molecule contains 2 hydrogen atoms and 1 oxygen atom.
• Relative atomic masses: (H (Hydrogen) = 1, O (Oxygen) = 16).
• Thus, The relative molecular mass of water is -
• $M_r (H_2O)= {2*A_r(H) + A_r(O)}$ = 2 x 1 + 16 = 18

The correct answer is 7.4

Key Points

• The pH values range from 0 to 14.
• A pH less than 7 is acidic and greater than 7 is basic.
• The pH value of human blood is 7.4.
• pH value of human blood is 7.4
• It is basic in nature.

Important Points

• pH value is used to indicate the acidity or basicity of an aqueous solution.
• A pH of 7 is considered neutral.
• The pH of acids is lower than 7.
• The pH of bases is more than 7.
• So, human blood can be said to be slightly basic in nature.
• the pH scale is from 0 to 14 where 0 means most acidic and 14 means most basic.
• It is a logarithmic scale and not a linear scale.

The correct answer is Attorney General of India.

Key Points

• The Attorney General (AG) of India is a part of the Union Executive.
• He is the highest law officer in the country who can be part of any court in the Indian Territory.
• He got the right to speak and to take part in the proceedings of both the Houses of Parliament or their joint sitting and any committee of the Parliament of which he may be named a member.
• He has no right to vote when he participates in the proceedings of the Indian Parliament.
• Similar to a Member of Parliament, he also enjoys all powers related to immunities and privileges.
• He is not considered a government servant.
• He can practice privately too as he is not debarred from private legal practice.

Important Points

• The first Attorney General of India, M.C.Setalvad worked in his post for the longest term, i.e. for 13 years and Soli Sorabjee worked as the Attorney General was the shortest period. However, he was appointed for the post twice.
• Senior advocate R Venkataramani has been appointed as the new Attorney General of In
• dia.

The correct answer is Legislative.

Key Points

• According to the Indian Constitution, the Union Legislative body is called the Parliament.
• The Indian Parliament consists of the Lok Sabha, Rajya Sabha, and the President of India.
• Article 79 defines the constitution of Parliament.
• Parliament consists of Lok Sabha, Rajya Sabha, and the President.
• Article 81 is related to Lok Sabha. It is the lower house of the Parliament.
• Article 83 is related to the duration of the parliament.
• Parliament, also called the Sansad, is the legislature of the Union. It has the President, and two houses- the Upper House and the Lower House.
• The Upper House is also called the Rajya Sabha or the Council of States while the Lower House is called the Lok Sabha or the House of the people.

Important PointsThere are three constituents of the Indian Parliament: The President of India, Lok Sabha, and Rajya Sabha-

• Those organisms that break down the organic food material outside their body by the secretions of hydrolytic enzymes are called decomposers.
• These decompose the complex organic food into the simpler inorganic substances and then absorb them.
• Bread mould, Yeast, Mushrooms are Fungi. These are decomposers.
• Snake take holozoic nutrition in which the food is digested in the body.
• Hence, the correct answer is Snake.

The correct answer is both paternal and maternal.

Key Points

• A child develops from a zygote.
• A zygote is formed by the fusion of a male gamete (sperm) and a female gamete (ovum) in the process of fertilization.
• The genetic material contained in the male and female gametes is responsible for influencing the trait of the child.
• So, both paternal and maternal DNA influence the traits in a child. Hence, the correct answer is ‘Both paternal and maternal’.

The correct answer is Arun Jaitley

Key Points

• The Ex- Union Minister for Finance, Defence, and Corporate Affairs, Arun Jaitley launched Pradhan Mantri Vaya Vandana Yojana (PMVVY) in July 2017.
• It is a Pension Scheme that aims to provide pensions exclusively to senior citizens aged 60 years and above.
• Life Insurance Corporation (LIC) of India has been given the sole privilege to operate this Scheme.

Important PointsArun Jaitley

• The former Finance Minister passed away on 24 August 2019. He was a Rajya Sabha member from Uttar Pradesh.
• Apart from the Finance Ministry, he was also handling the Ministry of Corporate Affairs.
• He was born on December 28, 1952. He did his schooling at St. Xavier’s School, New Delhi from 1960-69.
• He graduated in Commerce from Shri Ram College of Commerce, New Delhi in 1973 and passed a Law degree from the University of Delhi, in 1977.