6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Find two natural numbers whose sum is 85 andtheleast common multiple is 102.

A) 30 & 55	B) 17 & 68
C) 35& 55	D) 51 & 34

Answer & Explanation Answer: D) 51 & 34

Explanation:

Let a + b = 85→b = 85 –a

LCM(a,b) =102→ab = 102

k→a(85 –a) = 102k, where k is a natural number.

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Filed Under: Numbers
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Q:

If $x - \frac{1}{x} = 10$ , then find the value of $\frac{x^{4} + 1}{x^{2}}$

A) 98	B) 100
C) 102	D) 106

Answer & Explanation Answer: C) 102

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

What is the value of a-b when $a^{2} + b^{2} - 6 a - 6 b + 18 = 0$ ?

A) 0	B) 3
C) 6	D) 9

Answer & Explanation Answer: A) 0

Explanation:

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Q:

If the difference between the roots of the equation ${Ax}^{2} - Bx + C = 0$ is 4, then which of the following is TRUE?

A) B2 – 16A2 = 4AC + 4B2	B) B2 – 10A2 = 4AC + 6A2
C) B2 – 8A2 = 4AC + 10A2	D) B2 – 16A2 = 4AC + 8B2

Answer & Explanation Answer: B) B2 – 10A2 = 4AC + 6A2

Explanation:

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Filed Under: Simplification
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Q:

Simple interest on a certain sum of money for 3 years at 14% per annum is half the compound interest on Rs. 10000 for 2 years at 10% per annum. The sum placed on simple interest is

A) Rs 5000	B) Rs 1250
C) Rs 2000	D) Rs 2500

Answer & Explanation Answer: D) Rs 2500

Explanation:

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Filed Under: Simple Interest
Exam Prep: Bank Exams

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Q:

Slit 69 into three parts such that they are in A.P. and the product of their smaller parts is 483.

A) 19,23,27	B) 17,23,29
C) 15,23,31	D) 21,23,25

Answer & Explanation Answer: D) 21,23,25

Explanation:

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

26% of a number is 65. What is the number?

A) 50	B) 250
C) 260	D) 40

Answer & Explanation Answer: B) 250

Explanation:

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Filed Under: Percentage
Exam Prep: Bank Exams

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Q:

How much does one need to add to 2/3 to obtain 3/2?

A) 5/6	B) 1.5/6
C) 1/-1	D) 4/9

Quantitative Aptitude - Arithmetic Ability Questions

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