SSC CHSL Previous Paper 36 (Held On: 20 March 2018 Shift 1) (Previous Year Paper)

The correct answer is option 3. 

The error is in the third part of the sentence. 'All' refers to the total number of people or things of a group. There is a minimum of three things in the group. Hence, all take a plural verb.

We have to replace 'has been' with 'have been' in the third part of the sentence. 

• Let's see some examples:
• All of the pages are yellow and old.
• All of the fish in the pond have died.

So the correct answer is:

All that we admired and adored before as great and magnificent have been obliterated and demolished.

The correct analysis- 'error lies in the part-1'

Key Points

• Using 'evokes' in the place of 'evoke' makes the sentence errorless.
• In the sentence 'an online shop' is a singular subject and it will be followed by a singular verb and in the present indefinite we know that 'verb' is followed by 's/es'. So that replaces 'evokes' instead 'evoke'
• Structure of Present Indefinite:- Sub + V₁ + s/es + object
• Example: He goes to the market.

The correct sentence is- An online shop evokes the analogy of buying products or services (1)/ at a regular retailer or shopping center; the process (2)/ is called business-to-consumer (B2C) e-commerce.

The correct answer is- 'Dearly'

Key Points

• Using 'Dearly' is in the blank space to make the sentence correct.
• The word 'Dearly' is an adverb and it means 'very much'. 'Dearly' is qualifying to the verb 'pay' in the sentence. It is the most suitable option according to the context of the question.
• Example: She will be dearly missed by her family and friends.

The correct sentence is- He will pay dearly for his foolishness.

The correct answer is- 'Imperative'

Key Points

• Using 'Imperative' is an adjective and it means 'extremely important or urgent'. It is the most suitable option here according to the context of the given sentence.
• Example: It's imperative to act now before the problem gets really serious.

The correct sentence is- It is Imperative for all the students to follow the rules. 

Additional Information

The correct answer is- 'Deceive'

Key Points

• 'Beguile' is a verb and it means 'to persuade, attract, or interest someone, sometimes in order to deceive them' so that the similar word of 'Beguile' is 'Deceive'. It is the most suitable option here. 
• Example: He was completely beguiled by her beauty.

Hence option 1 is the most appropriate answer here.

Additional Information

The correct answer is- 'Absurd'

Key Points

• 'Farcical' is an adjective and it means 'very silly, unlikely, or unreasonable, often in a way that is humorous' so that the similar word of 'Farcical' is 'Absurd'. It is the most suitable option here. 
• Example: The whole situation has become farcical.
• ​Absurd: not at all logical or sensible; ridiculous
• Example: It would be absurd to spend all your money on one book.

Hence option 2 is the most appropriate answer here.

Additional Information

The correct answer is- 'Far'

Key Points

• 'Abutting' is a verb and it means 'If a building or area of land abuts something or on something, it is next to it or touches it on one side' so that the opposite word of 'Abutting' is 'Far'. It is the most suitable option here. 
• Example: Their house abutted onto the police station.

Hence option 2 is the most appropriate answer here

Additional Information

The correct answer is- 'Solution'

Key Points

• 'Predicament' is a noun and it means 'an unpleasant situation that is difficult to get out of' so that the opposite word of 'Predicament' is 'Solution'. It is the most suitable option here. 
• Example: She is hoping to get a loan from her bank to help her out of her financial predicament.

Hence option 4 is the most appropriate answer here.

Additional Information

The correct answer is- 'PQR'

Key Points

• A sentence can't end with the or and. Thus, neither P nor Q can be last => Option 3) PQR is the correct answer.

The correct sentence is- Attaining long term food security requires the raising of incomes and making food affordable.

The correct answer is- 'Those robots were manufactured by the Chinese company.'

Key Points

• In the given question the sentence 'The Chinese company manufactured those robots.' is in 'Active voice' which is in the past indefinite and we know that after converted this sentence into 'Passive voice' the tense will same which also should in past indefinite.
• Struture Past indefinite:
• Sub + V2 + object (Active)
• Object + was/were+ V3 + by + subject (Passive)
• Let's see the example:
• Reema cleaned the floor (Active)
• The floor was cleaned by Reema (Passive)

Hence the correct sentence is- Those robots were manufactured by the Chinese company.

The correct answer is- 'Bunty said that he might not come for the practice that day'

Key Points

• When we change into reported speech, may => might and today => that day. Hence option 3 is the most appropriate here.

The correct sentence is- Bunty said that he might not come for the practice that day.

The correct answer is- 'Mysterious'

Key Points 

• 'Mysterious' is an adjective and it means 'strange, not known, or not understood'
• Example: He died in mysterious circumstances, and there is still a possibility that it was murder.

Here, the correct spelling is- Mysterious

The correct answer is- 'Obsession'

Key Points

• Millenial = has been used as an adjective here; as in pertaining to people who attain adulthood in the 21^st century. Thus, the blank must contain a noun for it. Option 4) Obsession (passion; compulsion) is the correct answer.

The correct sentence is- is that the millennial obsession with taking pictures

The correct answer is- 'Of'

Key Points

• Using 'of' is in the blank space to make the sentence correct.
• Manifestation = symptom; sign. The sentence aims to say that the sign is related to our relationship... Thus, Option 3) 'of' aptly describes the context.

The correct sentence is- also be a manifestation of our relationship

The correct answer is- 'Changes'

Key Points

• Using 'changes' is in the blank space to make the sentence correct.
• Before you can register it => we will use the simple present tense. Rule out 3) and 4). Everything => singular => use Option 2) changes.

The correct sentence is- When everything around you changes before you can

The correct answer is- 'If'

Key Points

• Using 'if' is in the blank space to make the sentence correct.
• The statement states a condition that it may be as simple as a slice of toast. Condition => use 2) 'if'.

The correct sentence is- it later, even if the subject is as simple

The correct answer is- 'Also'

Key Points

• Using 'also' is in the blank space to make the sentence correct.
• The sentence aims to say that along with the possibility of being narcissistic, it is a self-portrait too. Too = also. Option 4) is the correct answer.

The correct sentence is- but it is also a self-portrait that anchors

The correct answer is- 'Used to refuse a request or indicate that there is no chance of success.'

Key Points

• 'No dice' is an idiom and it means 'If you are trying to achieve something and you say that it's no dice, you mean that you are having no success or luck with it.' 
• Example: If there'd been a halfway decent house for rent on this island, I would have taken it. But it was no dice.

Hence option 2 is the most appropriate answer here.

The correct answer is- 'To control something and prevent it from causing you problems.'

Key Points

• 'Keep at bay' is an idiom and it means 'to prevent someone from moving closer'
• Example: He held the police at bay for several hours.

Hence option 2 is the most appropriate answer here.

The correct answer is- 'Venerate'

Key Points

• The word 'Venerate' is a verb and it means 'to honour or very much respect a person or thing'
• Example: Robert Burns is Scotland's most venerated poet.

Hence option 2 is the most appropriate answer here.

Additional Information

The correct answer is- 'Smother'

Key Points

• The word 'Smother' is a verb and it means 'to kill someone by covering their face so that they cannot breathe'
• Example: They threatened to smother the animals with plastic bags.

Hence option 4 is the most appropriate answer here.

Additional Information

The correct answer is- 'Includes'

Key Points

• Using 'includes' in the place of 'include' to make the sentence correct.
• We know that 'learning' is the singular subject so that it will be followed by the singular verb. In the present indefinite tense verb will come with 's/es'. So that replaces 'includes' instead of 'include'.
• Structure of Present Indefinite:- Sub + V₁ + s/es + object
• Example: Ram goes to the market.

The correct sentence is- Learning includes discovery, insight, understanding as well as accumulation of information.

The correct answer is- 'Were going'

Key Points

• Using 'were going' in the place of 'was going' to make the sentence correct.
• In the given sentence 'We' is the plural subject so it will be followed by the plural verb 'were'. Option 2 is the best suitable option here.
• Structure of Past continuous:- Sub + was/were + V₁ + ing + object
• Example: Ram was going to the temple.

The correct sentence is- We protested that we were going all the way to Haridwar.

The correct answer is- ***'***CAB'

Key Points

The need and The need been felt  = grammatically incorrect phrases. Neither A nor B can be first. Option 2) CAB is the only possible correct choice.

The correct sentence is- The need to curb drunken driving on the highways has been felt over the years.

The correct answer is- 'Unattractiveness'

Key Points

• 'Unattractiveness' is a noun and it means 'not attractive: plain, dull.'
• Example: Fortunately their heady, heavenly aroma more than compensates for their physical unattractiveness.

Here, the correct spelling is- Unattractiveness

As newspaper is brain child of an editor, in the same way poem is the brain child of a poet.

Hence, “Poet : Poem” is the correct answer.

The pattern followed here is,

52 + 5 = 57

Similarly,

46 + 5 = 51

Hence, the correct answer is " 51 ".

The pattern followed here is:-

CEG is related to IKM as:-

Similarly,

FHJ is related to LNP as:-

Hence, the correct answer is "LNP".

The logic used here,

→ (Relation – Gender).

Let's check each option,

Here, we can see that Option 2 doesn't satisfy the logic.

Hence, the correct answer is " Male – Father ".

The logic used here is,

→ Second Number = (First Number × 2).

Let's check each option as per the logic,

1) 14 – 28

→ 28 = 14 × 2. 

2) 16 – 32

→ 32 = 16 × 2. 

3) 18 – 36

→ 36 = 18 × 2. 

4) 12 – 34

→ 34 ≠ 12 × 2.

Here, we can see that Option 4 doesn't satisfy the logic.

Hence, the correct answer is " 12 – 34 ".

The pattern followed here is:-

As can be seen clearly from the above that QNKH doesn't follow the pattern and thus, is the odd one out.

Hence, the correct answer is "QNKH".

On arranging word as per dictionary order,

3. Variety

4. Vicinity

5. Victory

1) Vanity

2) Vapour

Hence, the correct answer is " 34512 ".

The pattern followed here is:-

Hence, the correct answer is "30".

The pattern followed here is:-

Hence, the correct answer is "NY".

Given:-

Kartik celebrated his 9^th birthday 3 years ago. So,

The present age of Kartik → 9 + 3 = 12 years.

After 7 years Kishan's age will be 4 times of the Kartik's present age. So,

The Present age of Kishan + 7 → 4 × 12

The Present age of Kishan → (4 × 12) - 7 → 48 - 7 = 41 years

The Present age of Ashok is twice the Present age of Kishan. So,

The Present age of Ashok → 2 × 41 = 82 years

Hence, the correct answer is "82"

1. Burst → Disbursement

2) Sent → Disbursement

3) Barn → Disbursement, this word cannot be formed as there is no A in Disbursement.

4) Reib → Disbursement

Hence, the correct answer is " Barn ".

The pattern followed here is:-

TURTLE is written as RRNRIA as:-

Similarly,

LOYALS is written as JLUYIO as:-

Hence, the correct answer is "JLUYIO".

Given:-

8 × 10 ÷ 20 - 5 + 14

After changing the symbols, we get:-

New Equation → 8 + 10 × 20 ÷ 5 - 14

After applying BODMAS rule and solving the equation, we get:-

8 + 10 × 20 ÷ 5 - 14

8 + 10 × 4 - 14

8 + 40 - 14

48 - 14 = 34

Hence, the correct answer is "34".

Given:-

Equation → 14 + 18 × 40 - 10 ÷ 20 = 66

Now, Checking options one by one:-

1. • and × 

By interchanging + and ×, we get:-

New Equation → 14 × 18 + 40 - 10 ÷ 20 = 66

After applying BODMAS Rule and solving the equation, we get:-

14 × 18 + 40 - 10 ÷ 20 = 66

14 × 18 + 40 - 0.5 = 66

252 + 40 - 0.5 = 66

292 - 0.5 = 66

291.5 ≠ 66

Left hand side is not equal to right hand side.

2. • and ÷ 

By interchanging + and ÷, we get:-

New Equation → 14 ÷ 18 × 40 - 10 + 20 = 66

After applying BODMAS Rule and solving the equation, we get:-

14 ÷ 18 × 40 - 10 + 20 = 66

0.77 × 40 - 10 + 20 = 66

30.8 - 10 + 20 = 66

30.8 + 20 - 10 = 66

50.8 - 10 = 66

40.8 ≠ 66

Left hand side is not equal to right hand side.

3. • and +

By interchanging - and +, we get:-

New Equation → 14 - 18 × 40 + 10 ÷ 20 = 66

After applying BODMAS Rule and solving the equation, we get:-

14 - 18 × 40 + 10 ÷ 20 = 66

14 - 18 × 40 + 0.5 = 66

14 - 720 + 0.5 = 66

14 + 0.5 - 720 = 666

14.5 - 720 = 66

-705.5 ≠ 66

Left hand side is not equal to right hand side.

4. ÷ and - 

By interchanging ÷ and -, we get:-

New Equation → 14 + 18 × 40 ÷ 10 – 20 = 66

After applying BODMAS Rule and solving the equation, we get:-

14 + 18 × 40 ÷ 10 – 20 = 66

14 + 18 × 4 - 20 = 66

14 + 72 - 20 = 66

86 - 20 = 66

66 = 66

Left hand side is equal to right hand side.

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

The pattern followed here is:-

First number × Second number → Product × 2 = Resultant value

7 × 6 = 42 → 42 × 2 = 84

8 × 7 = 56 → 56 × 2 = 112

8 × 4 = 32 → 32 × 2 = 64

Similarly,

3 × 4 = 12 → 12 × 2 = 24

Hence, the correct answer is "24".

The pattern followed here is,

Here in the 1^st term the first two elements i.e. CC shift one position in right direction.

Hence the next term will be “ABABACCB”.

Hence, the leopard is 0.5 km south from its starting position.

The least possible venn diagram for the given statements is as shown below:-

Conclusions:

I) All trophies are badges → Doesn't follow (as no direct relationship is given between trophies and badges so, it is not definite that all trophies are badges)

II) Some badges are trophies → Doesn't follow (as no direct relationship is given between badges and trophies so, it is not definite that some badges are trophies)

Hence, the correct answer is "Neither conclusion I nor conclusion II follows".

Given:-

Rectangle represents Actors, Circle represents Curators, Triangle represents Poets and Square represents Fathers.

Set of letters in Rectangle that represents Actors are → B C D E G H

Set of letters in Circle that represents Curators are → B H I J

Set of letters in Triangle that represents Poets are → D E F

Set of letters in Square that represents Fathers are → A B C D I

Set of letters that represents Poets who are not Fathers are → Set of letters in Triangle that represents Poets - Common Set of letters of Triangle (that represents Poets) and Square (that represents Fathers)

The shaded portion below represents the Set of letters that represents Poets who are not Fathers i.e. → D E F - (D) = FE

Hence, the correct answer is "FE".

The pattern followed here is:-

Hence, the correct answer is "BDQ".

The pattern followed here is:-

Hence, the correct answer is "70".

The logic followed here is:-

First number × 3 = Second Number

First number × 4 + 1 = Third Number

1. In (14, 42, 59)

Second number → 14 × 3 = 42

Third number → 14 × 4 + 1 = 57 ≠ 59

2. In (15, 45, 61)

Second number → 15 × 3 = 45

Third number → 15 × 4 + 1 = 61

3. In (13, 39, 53)

Second number → 13 × 3 = 39

Third number → 13 × 4 + 1 = 53

4. In (12, 36, 49)

Second number → 12 × 3 = 36

Third number →12 × 4 + 1 = 49

As can be seen clearly from the above that (14, 42, 59) doesn't follow the logic and thus is the odd one out.

Hence, the correct answer is "(14, 42, 59)".

The correct mirror image of the given figure if 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.

From the figure we can conclude :

1. The face of the dice with a dot will be opposite to the circle.

2. The face of the dice with + will be opposite to *.

3) The face of the dice with four squares will be opposite to the square inscribed in a circle.

In the above figure (Option 1), the top surface of the cube is adjacent to the side having four squares, which is not possible.

Hence, the correct answer is " Option 1 ".

The pattern followed here is:-

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

1. 41 → K, 67 → W, 20 → G, 88 → Q (so, the letter cluster formed is KWGQ)

2) 99 → Y, 77 → O, 86 → R, 41 → K (so, the word formed is 'YORK')

3) 44 → M, 65 → W, 40 → A, 98 → P (so, the letter cluster formed is MWAP)

4. 23 → H, 95 → O, 14 → F, 89 → S (so, the letter cluster formed is HOFS)

Hence, the correct answer is "99, 77, 86, 41".

Calculation:

Let the fraction be x/y

When 3 is added to both the numerator and denominator of the fraction, we get

(x + 3)/(y + 3) = (3/5)

⇒ 5x + 15 = 3y + 9

⇒ 5x + 6 = 3y    ----(1)

When 3 is subtracted with both the numerator and denominator of the fraction,

(x – 3)/(y – 3) = (3/7)

⇒ 7x – 21 = 3y – 9

⇒ 7x – 12 = 3y   ----(2)

Substituting the value of ‘y’ from Equation 2 in Equation 1, we get

5x + 6 = 7x - 12

⇒ 2x = 18

⇒ x = 9

⇒ y = [(5 × 9) + 6]/3 =17

∴ Required Fraction = (x/y) = 9/17

Calculation:

We know that 15³ = 3375

So, (14.998)³ will be less than 3375 and the only option which satisfies this condition is 3374

Calculation:

We can see that all the terms in the given problem is a square and the square of any number is always positive. So, the sum can never be zero

The only possibility is when each term in the bracket is equal to 0

That is x – 7 = 0, y + 10 = 0, z – 6 = 0

The values of x, y, z will therefore be 7, -10 and 6 respectively

∴ Value of (x + y + z) = 7 + (-10) + 6 = 13 – 10 = 3

Calculation:

LCM of (2, 4, 8) is 8

Multiplying each term on both sides with 8, we get

8n + 4n + 2n + n = (45 × 8)

⇒ 15n = 360

⇒ n = 360/15 = 24

∴ Value of ‘n’ which satisfies the given equation is 24

Given:

Ratio of sides of similar triangles = 9/4

Concept used:

If two triangles are similar, ratio of areas is equal to the ratio of squares of corresponding sides.

Calculation:

(Area of Δ1)/(Area of Δ2) = (side of Δ₁)²/(side of Δ₂)²

⇒ (9/4)²

⇒ 81/16

∴ ratio of the area of two similar triangles = 81 ∶ 16

Calculation:

For the options to represent the sides of the acute-angled triangle, the sum of squares of any two sides should always be greater than the square of the third side

Option 2:

⇒ 7² + 8² > 10²

⇒ 82 + 102 > 72

⇒ 10² + 7² > 8²

∴ Correct option is 7, 8, 10

Given:

Out of two numbers, 65% of the smaller number is equal to 45% of the larger

number. If the sum of two numbers is 2574

Calculation:

Let the smaller number be ‘x’ and the larger number be ‘y’

From the problem, it is given that

65%x = 45%y

⇒ 13x = 9y

⇒ x = (9/13)y    ----(1)

Given the sum of the numbers = 2574

⇒ (x + y) = 2574     ----(2)

Substituting the value of ‘x’ from Equation 1 in Equation 2, we get

(9/13)y + y = 2574

⇒ (9y + 13y) = 2574 × 13

⇒ 22y = (2574 × 13)

⇒ y = (2574 × 13)/22 = 1521

∴ Value of the larger number is 1521

Calculation:

(4/7) P = (12/14) Q

⇒ (P/Q) = (12 × 7)/(14 × 4)

⇒ 84/56

⇒ 3/2

∴ Required Ratio (P: Q) = 3 : 2

Calculation:

Applying Allegation formula,

(Quantity of higher Price/ Quantity of Lesser Price) = (Average Price – Lesser Price)/(Higher Price – Average Price)

⇒ (13.5 – 12)/(17 – 13.5) = 1.5/3.5 = 15/35 = 3/7

∴ Required Ratio = 3 : 7

Given:

Average age of 5 students of a school = 14 years

Average age of students and their Mathematics and science teachers is 30 years

Age of science teacher = 6 years + age of Mathematics teacher

Formula used:

Average  = Sum of observation ÷ no. of observation

Calculation:

Total age of all the 5 students = 5 × 14 = 70      ----(1)

Total age of (Students + Mathematics Teacher + Science Teacher)

⇒ (5 + 1 + 1) × 30 = 7 × 30 = 210     ----(2)

Age of Science Teacher = 6 + Age of Mathematics Teacher    ----(3)

Substituting Equation 1 and Equation 3 in Equation 2, we get

70 + (Mathematics Teacher) + (6 + Age of Mathematics Teacher) = 210

⇒ 76 + 2(Age of Mathematics Teacher) = 210

⇒ 2 (Age of Mathematics Teacher) = 210 - 76 = 134

⇒ (Age of Mathematics Teacher) = 134/2 = 67

∴ Required Age = 67

Given:

Principal (P) = Rs. 6000,

Amount (A) = Rs. 7200,

Time Period (T) = 2 years

Formula used:

S.I. = P × R × T/100

Amount (A) = Principal [1 + (RT/100)]

In case of compound interest,

Amount = P [1 + (R/100)]T

where, P → Principal

R → Rate of interest

T → Time period

Calculation:

In case of simple interest, we have

⇒ 7200 = 6000 [1 + (RT/100)]

⇒ [1 + (RT/100)] = 7200/6000 = 1.2

⇒ (RT/100) = 1.2 - 1 = 0.2

⇒ R = (0.2 × 100)/T = (0.2 × 100)/2 = 10%

In case of C.I.

A = 6000 [1 + (10/100)]³

⇒ 6000 (1.1)³ = 6000 × 1.331 = Rs. 7986

∴ Final Amount = Rs. 7986

Cost Price of 1 kg of Sugar = Rs. X

Selling Price = Cost Price (1 – Loss %) = X (1 – 4%) = X (1 - 0.04) = 0.96x

Cost Price for 620 gms = 0.62X

Selling Price = Cost Price (1 + Profit%)

⇒ 0.96x = 0.62 (1 + Profit%)

⇒ 0.96x/0.62 = (1 + Profit%)

⇒ (1 + Profit%) = 1.5484

⇒ Profit = 1.5484 - 1 = 0.5484

⇒ Profit% = 54.84

∴ Required Percentage = 54.84%

Given:

Marked Price = Rs. 600,

Successive Discount = 10% and 25%

Formula used:

Selling Price = Marked Price (1 – x%) (1 – y%)

Where, x% and y% are successive Discounts

Calculation:

Selling Price = Marked Price (1 – 10%) (1 – 25%)

⇒ 600 × (1 – 0.1) (1 – 0.25)

⇒ 600 × 0.9 × 0.75

⇒ Rs. 405

Discount = Rs. (600 – 405) = Rs. 195

∴ Discount amount offered = Rs. 195

Shortcut TrickEffective discount rate = x + y - xy/100

Effective discount % = 10% + 25% - 10 × 25/100 = 32.5%

Discount =  32.5% of 600 = Rs. 195

Calculation:

(√5 + 2)/(√5 – 2)

Multiplying the numerator and Denominator with the rationalizing factor, (√5 – 2)

⇒ [(√5 + 2)/(√5 – 2)] × [(√5 + 2)/(√5 + 2)]

⇒ (√5 + 2)²/(5 – 4) = (√5 + 2)²

Square root of (√5 + 2)²

⇒ √(√5 + 2)²

⇒ √5 + 2

∴ Required value is (√5 + 2)

Given:

Let Q completed the work in x days

P completed the 1/2 of the work = x/3

⇒ P completed the whole work = 2x/3

Formula used:

Total work = Efficiency × time

Calculation:

According to the question,

1/(2x/3) + 1/(x) = 1/15

⇒ 3/2x + 1/x = 1/15

⇒ 5/2x = 1/15

⇒ x = 5 × 15/2

∴ P completed the whole work alone = 2x/3 = 2/3 × 5 × 15/2 = 25 days

Given:

A girl walking at the speed of 2 km/hr covers a certain distance in 7 hours 30 minutes.

She covers the same distance by cycle in 5 hours.

Formula used:

Distance = Speed × Time

Calculation:

If the distance is constant, then the Speed is indirectly proportional to Time (Product of Speed and Time is constant

S₁ × T₁ = S₂ × T₂

⇒ 2 × 7.5 = S₂ × 5

⇒ S₂ = (2 × 7.5)/5

⇒ 15/5

⇒ 3 kmph

∴ The speed of the cycle is 3 kmph.

Calculation:

From the graph, it can be seen that the second highest value is for country B which is 800

So, the country with the second highest population is B.

Calculation:

Population of country A = 500

Population of country G = 650

Ratio of population of country A to country G = 500 : 650 = 10 : 13

∴ Required Ratio = 10 : 13

Calculation:

Population of country E = 1000

Population of country A = 500

Difference in the population of E and A = 1000 - 500 = 500

Population of country E is greater than that of country A by [(Difference of the population)/Population of country A] × 100%

⇒ [500/500] × 100% = 100%

∴ Required Percentage = 100%

Shortcut TrickRatio of E : A = 1000 : 500 = 2 : 1

⇒ E is 1 unit greater than A

⇒ 1/1 × 100% = 100%

Calculation:

Population of country D = 50

If $120 is spent per person in country D, then the total amount spent

⇒ 50 million × 120 = $6000 million

∴ Required answer = $6000 million$

Given:

Length of the rectangle = 8 cm,

Length of the diagonal = 17 cm

Formula used:

Area of rectangle = l × b

(D)² = (l)² + (b)²

where l → length of the rectangle

b → breadth of the rectangle

D → diagonal of the rectangle

Calculation:

⇒ (b)² = (17)² - (8)² = 289 - 64 = 225

Breadth = √225 = 15

Area of the rectangle = 8 × 15 = 120 cm²

∴ Area of the Rectangle = 120 cm²

Given:

The measure of the interior angle of a regular polygon = 120

Formula used:

Interior angle of a regular polygon = (n ­- 2) 180 ^o/n

where ‘n’ →  number of sides of the regular polygon

Calculation:

⇒ 120^o = (n - 2) 180^o/n

⇒ 120^on = 180^on - 360^o

⇒ 180^on - 120^on = 360^o

⇒ 60^on = 360^o

⇒ n = 360^o/60^o = 6

∴ Number of sides = 6

Given:

Diameter of a hemisphere = 21cm

Formula used:

Total surface area of a hemisphere = 3πr²

where r → radius of hemisphere

Calculation:

r = 21/2 = 10.5 cm

Total surface area = 3 × (22/7) × 10.5² = 1039.5

∴ Required value is 1039.5cm²

Calculation:

We know that sin 45° = (1/√2)

Value of (sin 45° – √3) = (1/√2) – √3 = (1 – √6)/√2

∴ Required answer is (1 – √6)/√2

Calculation:

We know that cotD = Adjacent/Opposite = DE/EF = 8/15

Let the sides DE and EF be 8x and 15x respectively

Given DE = 8x = 16

⇒ x = 16/8 = 2 cm

Length of EF = 15x = (15 × 2) = 30 cm

∴ EF = 30 cm

• Skill may be defined as proficiency, a facility that is acquired or developed through training and experience.
• Basic skills or competencies which psychologists have identified for becoming an effective psychologist- i) General skills ii) Observational skills iii) Specific skills
• General skills are transferred to other employers.
• Specific skillsare skills that require very special professional functioning.

• Thermal power is the biggest consumer of water in India.
• Engineering is the second biggest consumer of water in India.
• Paper and pulp industry comes on third rank and textiles comes on fourth rank for consuming water

The correct answer is option 4, i.e. Equatorial.

• The equatorial region receives rainfall throughout the year. It includes a country like Sri Lanka, Malaysia.
• It receives rainfall every day.
• In the Mediterranean region, rainfall is moderate and during winter months.
• In the tundra region, the regions are covered with snow for nine months in a year, and the precipitation is low.
• Monsoon receives abundant rainfall but it does not receive rainfall throughout the year.

The correct answer is Andhra Pradesh.

Key Points

• Kolleru Lake
• Kolleru lake is one of the largest freshwater lakes in India.
• It is located in Andhra Pradesh between Krishna and Godavari rivers.
• It is a major attraction to many migratory bird species like Siberian crane, ibis, painted storks, grey pelican, etc.
• It is a safe breeding house for these migratory birds.
• Kolleru lake wetland has been recognized with the status of one among multiple 'Wetlands of International importance' by the Ramsar convention in 2002.
• Kolleru Bird Sanctuary which was established in 1999 protects the wetland area.
• The Atapaka Bird Sanctuary is also located at Kolleru.

Additional Information

• Andhra Pradesh
• The state of Andhra Pradesh was formed in 1953.
• The capital of Andhra Pradesh is Amaravati.
• The Chief Minister of Andhra Pradesh is Y. S. Jaganmohan Reddy.
• The official language of Andhra Pradesh is Telugu.

• Aurangzeb re-imposed Jizya in 1679.
• Jizya is type of tax imposed on the non-muslims.
• Alauddin khilji was the first person who imposed this tax in india on non-muslims.
• It was abolished in the reign of Akbar.

• In 1856, the East India Company passed a new law in which sea travel has been made mandatory for Indian soldiers.
• In those time, many people in the country believed that if they crossed the sea they would lose their religion and caste.

The correct answer is Non-violence.

Key Points

• Jainism
• Jainism, traditionally known as Jain Dharma, is an ancient Indian religion.
• It is one of the oldest Indian religions.
• The three main pillars of Jainism are ahiṃsā (non-violence), anekāntavāda (non-absolutism), and aparigraha (non-attachment).

Additional Information

Some most important fundamental principle of Jainism are:

• Five principles of Jainism are
• Non-Violence (Ahimsa)
• No lies (Satya)
• No stealing (Asteya)
• No Property (Aparigraha)
• Observing Continence (Brahmacharya).
• The fifth principle (Brahmacharya) was added by Mahavira and the other four were the teachings of his Predecessors.
• Mahavira was the 24^th Tirthankara of Jain.

• India will provide financial assistance of $ 2.87 million for the public transport system to Afghanistan.
• The assistance will be used to repair around 350 public buses in the country$.

• Emma Stone at the age of 28, is world's highest paid actresses according to Forbes 2017 list.
• Jennifer Aniston is second in the list.
• Jennifer Lawrence is at third position.

• Coffeewas first cultivated in Sri Lanka under plantation agriculture.
• But it was not successful by the Dutch in 1740.
• By 1860, the country was amongst the major coffee-producing nations in the world when British began large scale commercial production.

• Al (Alumunium) - Metal
• P (Phosphorous) - Non-metal
• Ca (Calcium) - Metal
• K (Potassium) - Metal

Concept:

Metals:

• The elements readily form positive ions (cations) are called metals.​
• Metals are usually solid, a good conductor of heat and electricity, malleable, ductile, sonorous, and have good tensile strength.
• Sodium, Potassium, Magnesium, Iron, Copper, Silver, etc are a few examples of metals.
• ​Metals react with oxygen to form their respective metal oxides, this reaction goes in the manner given by the general equation.

​Metal + oxygen → Metal oxides

• To test the acidity and basicity of these metal oxides, they are made with water and then react with water, and then tested with litmus paper.
• A basic solution turns litmus to blue whereas an acidic solution turns blue litmus to red.
• Metals produce basic oxides when dissolved in water.

Non-Metal:

• The physical properties of non-metals are the opposite of metals. For example, They are insulators, have lower tensile strength, dull appearance.
• They form negative ions by accepting or gaining electrons.
• Generally, the Oxides of non-metals are acidic in nature.

Explanation:

• P is for phosphorous which is non-metal. Other Al - Aluminium, Ca - Calcium, and K - Potassium is some metals.
• Phosphorous is p block element they are generally non-metal, metalloid, and some metals.
• Ca, K is s block element and they are generally metal.
• Al is p block element but metallic in nature.

• Electron contains one negative charge
• Positron and proton contain one positive charge that is the same charge.
• Neutron contains no charge; they are neutral.
• Alpha contains charge of two protons.

Confusion Points

Electron takes same but opposite charge as of proton.

• According to article 74, oath of secrecy to union ministers is administered by the President of India.

• After Six months, laws made by Parliament on the state subjects during a National Emergency become inoperative and cease to operate.
• This is according to Part XVIII of the constitution from article 352 to 360.

The correct answer is No option is correct.

Key Points

• The plant kingdom is divided into 2-sub kingdoms, Cryptogams and Phanerogams.
• Cryptogams are flowerless and seedless plants that produce spores. They include thallophytes, bryophytes, and pteridophytes. Examples: fern, liverworts, etc
• Phanerogams are seed-bearing plants that include angiosperms and gymnosperms. Examples: pine, petunia, etc.

Additional Information

• Thallophyte
• They are commonly called algae.
• The plant body is not differentiated from roots, stems, and leaves.
• Examples: spirogyra, Ulothrix, etc.
• Bryophytes:
• They are often referred to as amphibians of the plant kingdom.
• These are small terrestrial plants.
• They show differentiation in the body design, with stem, leaf-like structures, and root-like structures.
• Examples: Funaria, Marchantia, etc.
• Pteridophyta:
• These plants are having specialized tissue for conduction.
• The plant body is differentiated into roots, stems, and leaves.
• Examples: Fern, Marsilea, etc.

• Swachh Survekshan2018 conducted in January-February 2017 ranking 434 cities.
• Minister of Housing and Urban Affairs (formerly Ministry of Urban Development) had conducted Swachh Survekshan.
• The objective of the survey is to encourage large scale citizen participation.

• Scientists introduced fully functional artificial muscle to recover damages of Heart in November 2017.
• It is specially made for patients who have suffered from heart attacks.
• No fully artificial lungs and fully artificial kidney hasbeen introduced.
• The first bioartificial liver device has been introduced in 2001.

• HDFC Bank launched an artificial intelligence – driven chatbot named ‘EVA (Electronic Virtual Assistant)’ on 5march 2017.
• Eva is India's first AI-based banking chatbot and can answer millions of customer queries across multiple channels instantly.

• Ministry of Railway announced to set up a massive rail coach factory in Marathwadaregion of Maharashtra on 31 January 2018.
• The decision was taken at a high-level meeting with Mr Goyal (Railway minister at that time) and Mr Fadnavis (CM of Maharashtra).
• The new coach plant will create an industrial ecosystem in the drought-prone region.