6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Average of 10 numbers is 14. If each number is multiplied by 6, then what will be the new average?

A) 70	B) 84
C) 56	D) 92

Answer & Explanation Answer: B) 84

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Q:

Calculate the value of x if $\sqrt{1 - (\frac{x}{289})} = \frac{15}{17}$

A) 64	B) 44
C) 36	D) 54

Answer & Explanation Answer: A) 64

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Q:

ΔDEF is right angled at E. If cosecD = 25/24, then what is the value of cosF ?

A) 25/7	B) 24/7
C) 24/25	D) 7/24

Answer & Explanation Answer: C) 24/25

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Q:

What is the value of $\sqrt{1054 + \sqrt{196} + \sqrt{169} + \sqrt{64}}$ ?

A) 33	B) 37
C) 29	D) 31

Answer & Explanation Answer: A) 33

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Q:

If $\tan^{4} θ + \tan^{2} θ = 2$ , then $\sec^{4} θ - \sec^{2} θ = ?$

A) 0	B) 3
C) 2	D) 1

Answer & Explanation Answer: C) 2

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Q:

Find the odd man out of the following number series?

22, 26, 42, 78, 142, 244

A) 244	B) 142
C) 78	D) 42

Answer & Explanation Answer: A) 244

Explanation:

The given number series 22, 26, 42, 78, 142, 244 follows a pattern that,

$22 22 + 2^{2} = 22 + 4 = 26 26 + 4^{2} = 26 + 16 = 42 42 + 6^{2} = 42 + 36 = 78 78 + 8^{2} = 78 + 64 = 142 142 + 10^{2} = 142 + 100 = 242$

Hence, the odd one in the given number series is 244.

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Q:

Pick an odd man in the given number series?

4 12 38 87 198

A) 12	B) 38
C) 87	D) 198

Answer & Explanation Answer: A) 12

Explanation:

The given series follows a pattern that,

$4 + 3^{2} = 4 + 9 = 13 13 + 5^{2} = 13 + 25 = 38 38 + 7^{2} = 38 + 49 = 87 87 + 9^{2} = 87 + 81 = 198$

Hence, the odd man in the given number series is 12.

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Q:

∆DEF is right angled at E. If secD = 17/8, then what is the value of cosF?

A) 15/17	B) 15/8
C) 8/17	D) 17/15

Quantitative Aptitude - Arithmetic Ability Questions

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