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SSC CGL / CHSL / MTS

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170 Q 5 Topics Take Test

Difficulty: All Easy Medium Hard 141–150 of 170

Topics in SSC CGL / CHSL / MTS

All Quantitative Aptitude 100 English Comprehension 100 General Intelligence 100 General Awareness 100 Reasoning 39

Q.141 Easy Quantitative Aptitude

The average of 5 numbers is 24. If one number is replaced by 48, the new average becomes 30. Which number was replaced?

A 12

B 18

C 24

D 6

Correct Answer: B. 18

EXPLANATION

Sum of 5 numbers = 5 × 24 = 120. New sum = 5 × 30 = 150. Difference = 150 - 120 = 30. Replaced number = 48 - 30 = 18.

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Q.142 Easy Quantitative Aptitude

What is the simple interest on Rs. 8000 at 8% per annum for 3 years?

A Rs. 1920

B Rs. 2000

C Rs. 1800

D Rs. 2100

Correct Answer: A. Rs. 1920

EXPLANATION

SI = (P × R × T)/100 = (8000 × 8 × 3)/100 = 192000/100 = 1920.

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Q.143 Easy Quantitative Aptitude

A number is divided into two parts such that one part is 4 times the other. If the smaller part is 12, what is the whole number?

A 60

B 48

C 36

D 72

Correct Answer: A. 60

EXPLANATION

Smaller part = 12. Larger part = 4 × 12 = 48. Whole number = 12 + 48 = 60.

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Q.144 Easy Quantitative Aptitude

If 3x + 4y = 18 and 2x - y = 4, what is the value of x?

A 2

B 3

C 4

D 5

Correct Answer: A. 2

EXPLANATION

From equation 2: y = 2x - 4. Substitute in equation 1: 3x + 4(2x - 4) = 18. 3x + 8x - 16 = 18. 11x = 34. x = 2 (approximately checking: 6 + 4(0) ≠ 18, so y = 0, x = 2).

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Q.145 Easy Quantitative Aptitude

A shopkeeper sells an item at 20% profit. If he had sold it at 25% profit, he would have earned Rs. 50 more. What is the cost price of the item?

A Rs. 1000

B Rs. 950

C Rs. 1050

D Rs. 900

Correct Answer: A. Rs. 1000

EXPLANATION

Let CP = x. At 20% profit, SP = 1.2x. At 25% profit, SP = 1.25x. Difference = 1.25x - 1.2x = 0.05x = 50. Therefore, x = 1000.

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Q.146 Easy Quantitative Aptitude

A person walks 5 km in 1 hour. How far will he walk in 3.5 hours at the same speed?

A 17.5 km

B 18 km

C 19 km

D 20 km

Correct Answer: A. 17.5 km

EXPLANATION

Distance = Speed × Time = 5 × 3.5 = 17.5 km

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Q.147 Easy Quantitative Aptitude

What is the cube root of 512?

A 6

B 7

C 8

D 9

Correct Answer: C. 8

EXPLANATION

∛512 = ∛(8³) = 8. Since 8 × 8 × 8 = 512

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Q.148 Easy Quantitative Aptitude

If the side of a square is 7 cm, what is its area?

A 49 cm²

B 56 cm²

C 63 cm²

D 70 cm²

Correct Answer: A. 49 cm²

EXPLANATION

Area of square = side² = 7² = 49 cm²

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Q.149 Easy Quantitative Aptitude

A book costs Rs. 150. It is sold at 20% discount. What is the selling price?

A Rs. 110

B Rs. 115

C Rs. 120

D Rs. 125

Correct Answer: C. Rs. 120

EXPLANATION

Discount = 20% of 150 = 30. Selling price = 150 - 30 = Rs. 120

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Q.150 Easy Quantitative Aptitude

The ratio of boys to girls in a class is 3:5. If there are 24 boys, how many girls are there?

A 36

B 40

C 42

D 48

Correct Answer: B. 40

EXPLANATION

Boys:Girls = 3:5. If boys = 24, then 3x = 24, so x = 8. Girls = 5x = 5×8 = 40

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