6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

A natural number when increased by 12 equals 160 times its reciprocal. Find the number?

A) 20	B) 12
C) 8	D) 4

Answer & Explanation Answer: C) 8

Explanation:

Let the required number be 'p'.

From the given data,

p + 12 = 160 x 1/p

=> p + 12 = 160/p

=> p(p + 12) = 160

=> P^2 + 12p - 160 = 0

=> p^2 + 20p - 8p - 160 = 0

=> P(p + 20) - 8(p + 20) = 0

=> (p + 20)(p - 8) = 0

=> p = -20 or p = 8

As, given the number is a natural number, so it can't be negative.

Hence, the required number p = 8.

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Filed Under: Problems on Numbers
Exam Prep: AIEEE , Bank Exams , CAT
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4 3129

Q:

What is the value of $\sqrt{729} + \sqrt{72.9} + \sqrt{7.29}$

A) 30.5	B) 32.33
C) 35.6	D) 38.23

Answer & Explanation Answer: D) 38.23

Explanation:

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Filed Under: Square Roots and Cube Roots

8 3124

Q:

Raghu bought an article for Rs. 14,360 and spent Rs. 240 on its transportation. At what amount he has to sell it to get a profit of 15%? (in Rs.)

A) ₹ 16,000	B) ₹ 16,790
C) ₹ 16,150	D) ₹ 16.500

Answer & Explanation Answer: B) ₹ 16,790

Explanation:

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

0 3121

Q:

A drum contains 80 litres of ethanol. 20 litres of this liquid is removed and replaced with water. 20 litres of this mixture is again removed and replaced with water. How much water (in litres) is present in this drum now?

A) 45	B) 40
C) 35	D) 44

Answer & Explanation Answer: C) 35

Explanation:

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Filed Under: Alligation or Mixture
Exam Prep: Bank Exams

0 3120

Q:

In an election between two candidates, the winning candidate got 70% of the valid votes and won by a majority of 9000 votes. If out of total votes polled 90% votes are valid, then what is the total number of votes polled?

A) 30000	B) 25000
C) 22500	D) 27000

Answer & Explanation Answer: B) 25000

Explanation:

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Filed Under: Percentage
Exam Prep: Bank Exams

21 3117

Q:

Find the compound amount if $1200 is deposited at 8% interest for 11 years if interest is compounded continuously

A) 1456	B) 1456
C) 1693.08	D) 1890

Answer & Explanation Answer: C) 1693.08

Explanation:

M=Pe^yr

2893.08

I=M-P

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Filed Under: Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams
Job Role: Bank PO

0 3116

Q:

25 divided by 7

A) 3.571	B) 35.71
C) 0.351	D) 0.0357

Answer & Explanation Answer: A) 3.571

Explanation:

Here we have 25 divided by 7.

25 will not go directly in 7

Hence, we get the result in decimals.

25/7 = 3.571.

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Filed Under: Numbers
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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4 3109

Q:

The ratio of the members of blue to red balls in abag is constant. When there were 44 red balls, the number of blue balls was 36. If the number of blue balls is 54, how many red balls will be in the bag?

A) 68	B) 32
C) 64	D) 66

Quantitative Aptitude - Arithmetic Ability Questions

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