6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Find x.

693.5 - (47.23 - x) - 82.48 = 8.172.

A) -720.578	B) -555.618
C) -650.078	D) 831.382

Answer & Explanation Answer: B) -555.618

Explanation:

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5 82237

Q:

Solve the following : 80÷[48−56−(60−36÷12×4)]=?

A) 5	B) 8
C) 4	D) 2

Answer & Explanation Answer: D) 2

Explanation:

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2 82162

Q:

If the sum of two numbers is 55 and the H.C.F. and L.C.M. of these numbers are 5 and 120 respectively, then the sum of the reciprocals of the numbers is equal to:

A) 55/601	B) 601/55
C) 11/120	D) 120/11

Answer & Explanation Answer: C) 11/120

Explanation:

Let the numbers be a and b.

Then, a + b = 55 and ab = 5 x 120 = 600.

The required sum = $\frac{1}{a} + \frac{1}{b}$ = $\frac{a + b}{a b}$ = $\frac{55}{600}$ = $\frac{11}{120}$

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135 82070

Q:

Solve the following :

(-4){19 - (-2) x (-8)} = ?

A) 12	B) -140
C) 140	D) -12

Answer & Explanation Answer: D) -12

Explanation:

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Q:

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

69÷3×0.85+24.5-13.8=?

A) 31.75	B) 30.25
C) 28.95	D) 35.25

Answer & Explanation Answer: B) 30.25

Explanation:

= (69x85/3x100) + 10.7

= 30.25.

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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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Exam Prep: AIEEE , Bank Exams , CAT , GATE
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2 81754

Q:

Find the wrong number in the given number series?

180, 90, 60, 40, 36

A) 36	B) 40
C) 60	D) 90

Answer & Explanation Answer: B) 40

Explanation:

The given number series is 180, 90, 60, 40, 36

It follows a pattern that,

180 x 1/2 = 90

90 x 2/3 = 60

60 x 3/4 = 45 (NOT 40)

45 x 4/5 = 36

Hence, the wrong number in the given series is 40.

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Q:

Consider the following for real numbers α, β, γ and δ ?

1) sec α = 1/4

2) tan β = 20

3) cosec γ = 1/2

4) cos δ = 2

How many of the above statements are not possible?

A) one	B) two
C) three	D) four

Answer & Explanation Answer: C) three

Explanation:

Sec of any number can never be less than 1

tan can take any value from -∞ to + ∞

cosec of any number can never be less than 1

cos of any number can never be greater than 1

so option 1,3,4 are not possible

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Quantitative Aptitude - Arithmetic Ability Questions

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