6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Find the next number in the given number series?

3, 10.5, 36.75, 128.625, ?

A) 295.651	B) 354.146
C) 398.78	D) 450.187

Answer & Explanation Answer: D) 450.187

Explanation:

Here the given number series 3, 10.5, 36.75, 128.625, ? follows a pattern that

3

3 x 3.5 = 10.5

10.5 x 3.5 = 36.75

36.75 x 3.5 = 128.625

128.625 x 3.5 = 450.187

Hence the next number in the given number series is 450.187.

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2 77504

Q:

Simplify the following :

$4 \frac{1}{5} \times 3 \frac{1}{3} + ? = 20 % of 120$

A) 10	B) 24
C) 36	D) 40

Answer & Explanation Answer: A) 10

Explanation:

Given equation can be written as

$\frac{21}{5} x \frac{10}{3} + ? = 24 = > 14 + ? = 24 = > ? = 24 - 14 = > ? = 10$

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Filed Under: Simplification
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1 77428

Q:

If ${(\frac{5}{7})}^{4 x} . {(\frac{7}{5})}^{3 x - 1} = {(\frac{7}{5})}^{6}$ , then find the value of x which satisfies the equation.

A) -1	B) -7
C) 1	D) 7

Answer & Explanation Answer: B) -7

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 77191

Q:

A man and his wife appear in an interview for two vacancies in the same post. The probability of husband's selection is (1/7) and the probability of wife's selection is (1/5). What is the probability that only one of them is selected ?

A) 2/7	B) 1/7
C) 3/4	D) 4/5

Answer & Explanation Answer: A) 2/7

Explanation:

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Filed Under: Probability

357 76977

Q:

12 men can complete a work in 8 days. 16 women can complete the same work in 12 days. 8 men and 8 women started working and worked for 6 days. How many more men are to be added to complete the remaining work in 1 day?

A) 8	B) 12
C) 16	D) 24

Answer & Explanation Answer: B) 12

Explanation:

1 man's 1 day work =1/96 ; 1 woman's 1 day work = 1/192

Work done in 6 days= $6 (\frac{8}{96} + \frac{8}{192}) = 6 \times \frac{1}{8} = \frac{3}{4}$

Remaining work = 1/4

(8 men +8 women)'s 1 day work = $1 (\frac{8}{96} + \frac{8}{192})$ =1/8

Remaining work =1/4 - 1/8 = 1/8

1/96 work is done in 1 day by 1 man

Therefore, 1/8 work will be done in 1 day by 96 x (1/8) =12 men

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326 76770

Q:

2.5, 3.5, 9, 40, ?

Find the next number in the above-given series?

A) 316	B) 328
C) 323	D) 340

Answer & Explanation Answer: B) 328

Explanation:

2.5 × 1 + 1 = 3.5

3.5 × 2 + 2 = 9

9 × 4 + 4 = 40

40 × 8 + 8 = 328

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15 76641

Q:

Find the odd man out of the following number series?

720, 732, 708, 742, 696

A) 696	B) 742
C) 708	D) 732

Answer & Explanation Answer: B) 742

Explanation:

The given number series is 720, 732, 708, 742, 696

720

720 + 12 = 732

732 - 24 = 708

708 + 36 = 744 (Not 742)

744 - 48 = 696

Hence, the odd man in the given number series is 742.

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3 76173

Q:

The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?

A) 70 kg	B) 75 kg
C) 80 kg	D) 85 kg

Answer & Explanation Answer: D) 85 kg

Explanation:

Total weight increased = (8 x 2.5) kg = 20 kg.

Weight of new person = (65 + 20) kg = 85 kg.

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267 76142

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