6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

What is the value of (√2/3 - cosec60)?

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

Answer & Explanation Answer: A) (√6-6)/3√3

Explanation:

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Q:

Find the odd man out in the following number series?

71, 88, 113, 150, 203, 277

A) 277	B) 203
C) 150	D) 113

Answer & Explanation Answer: A) 277

Explanation:

The given number series is

71 88 113 150 203 277

+17 +25 +37 +53 +74

+8 +12 +16 +21

+4 +4 +5

The series should be 71 88 112 150 203 276 i.e, the differences of the difference should be +4.

Hence, the odd man in the given series is 277.

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Q:

Find the odd man out of the series?

128, 32, 14, 2.66, 0.88

A) 32	B) 14
C) 2.66	D) 0.88

Answer & Explanation Answer: B) 14

Explanation:

Here the given series is 128, 32, 14, 2.66, 0.88

128 / 4 = 32

32 / 3 = 10.666

10.666 / 4 = 2.666

2.666 / 3 = 0.888

Hence, the odd man in the given number series is 14.

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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

Explanation:

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Q:

What should come in place of question mark (?) in the following question?

115 ÷ 5 + 12 × 6 = ? + 64 ÷ 4 - 35

A) 95	B) 136
C) 102	D) 74

Answer & Explanation Answer:

Explanation:

As per the BODMAS rule, the priority in which the operations should be done is:

Priority wise operations	Symbol
B-Bracket	()
O-of	of
D-Division	/,÷
M-Multiplication	*,x
A-Addition	+
S-Subtraction	-

Note: Addition and subtraction can be treated on same priority (from left to right) when they are in consecutive order.

(115/5) + 12 × 6 = ? + (64/4) – 35 23 + 72 = ? + 16 – 35 95 = ? - 19 95+19 = ? ? = 114

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Q:

The total age of A and B is 12 years more than the total age of B and C. C is how many years younger than A ?

A) 12	B) 13
C) 14	D) 15

Answer & Explanation Answer: A) 12

Explanation:

(A+B) - (B+C) = 12

$\Rightarrow$ A - C = 12.

$\Rightarrow$ C is younger than A by 12 years.

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Q:

The ratio of two numbers is 3 : 4 and their H.C.F is 4. Their L.C.M is

A) 12	B) 16
C) 24	D) 48

Answer & Explanation Answer: D) 48

Explanation:

Let the numbers be 3x and 4x . Then their H.C.F = x. So, x=4

Therefore, The numbers are 12 and 16

L.C.M of 12 and 16 = 48

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Q:

Find out the wrong term in the following number series.

4, 16, 37, 58, 81.

A) 16	B) 37
C) 81	D) 4

Answer & Explanation Answer: C) 81

Explanation:

The series follows the following pattern.

4

16 = $4^{2}$

37 = $1^{2} + 6^{2}$

58 = $3^{2} + 7^{2}$

81 $\neq 5^{2} + 8^{2}$ .

Here every number is based on the digits of previous number. Hence, 81 is the wrong number in the given series.

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Quantitative Aptitude - Arithmetic Ability Questions

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