6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Solve the following :

123 + 12.3 + 1.23 + 0.123 + 0.0123 = ?

A) 136.7659	B) 136.653
C) 136.6653	D) 136.7760

Answer & Explanation Answer: C) 136.6653

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Q:

In the below word how many words are there in which R and W are at the end positions?

RAINBOW

A) 120	B) 180
C) 210	D) 240

Answer & Explanation Answer: D) 240

Explanation:

When R and W are the first and last letters of all the words then we can arrange them in 5!ways. Similarly When W and R are the first and last letters of the words then the remaining letters can be arrange in 5! ways.

Thus the total number of permutations = 2 x 5! = 2 x 120 = 240

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Q:

ΔXYZ is right angled at Y. If m∠Z = 30°, then find the value of (sinX - 3/√2).

A) (√6-6)/2√2	B) (√2-√3)/√6
C) -1/2	D) (1-2√3)/2

Answer & Explanation Answer: A) (√6-6)/2√2

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Q:

What is the value of (sin45 - √3) ?

A) (1-√6)/√2	B) (4-√3)/2√3
C) -1/2√3	D) (2-√3)/2√3

Answer & Explanation Answer: A) (1-√6)/√2

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Q:

If z = 6 - 2√3, then find the value of ${(\sqrt{z} - \frac{1}{\sqrt{z}})}^{2}$ .

A) 102 - 4634	B) 102 - 4632
C) 102 - 46324	D) 12 - 46324

Answer & Explanation Answer: C) 102 - 46324

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Q:

$Cosec (90 - θ)$

A) tan θ	B) cot θ
C) sec θ	D) cos θ

Answer & Explanation Answer: C) sec θ

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Q:

Find the odd man out?

3, 12, 39, 120, 364

A) 364	B) 120
C) 39	D) 3

Answer & Explanation Answer: A) 364

Explanation:

The given number series is 3, 12, 39, 120, 364

$3 3 + 3^{2} = 3 + 9 = 12 12 + 3^{3} = 12 + 27 = 39 39 + 3^{4} = 39 + 81 = 120 120 + 3^{5} = 120 + 243 = 363 (Not 364)$

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7 63177

Q:

$If \sqrt{3} = 1.732, then what is the value of (\sqrt{3} - \frac{10}{\sqrt{3}} + \sqrt{27}) ?$

A) 1.154	B) 1.577
C) 1.464	D) 2.358

Quantitative Aptitude - Arithmetic Ability Questions

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