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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Q:

What is the value of Cot 45° - (1/√3)Cosec 60°?

A) 1/√3	B) 1/2
C) 1/√2	D) 1/3

Answer & Explanation Answer: D) 1/3

Explanation:

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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:

The factors of $x^{2} + 8 x + 12$ are

A) (x+6)(x+2)	B) (x-6)(x+2)
C) (x-4)(x-4)	D) (x+6)(x-2)

Answer & Explanation Answer: A) (x+6)(x+2)

Explanation:

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Q:

If x + 2(3-5x) > -1 - 2x < 5 - x/3; then the value of x is

A) -3	B) -4
C) 2	D) 3

Answer & Explanation Answer: A) -3

Explanation:

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Q:

The upper part of a tree broken over by the wind make an angle of 60 deg with the ground. The distance between the root and the point where top of the tree touches the ground is 25 metres. What was the height (in metres) of the tree?

A) 84.14	B) 93.3
C) 98.25	D) 120.24

Answer & Explanation Answer: B) 93.3

Explanation:

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Q:

HCF of two numbers is 19 and their LCM is 665. If one of the number is 95, find the other.

A) 19	B) 133
C) 190	D) 77

Answer & Explanation Answer: B) 133

Explanation:

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Filed Under: HCF and LCM
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Q:

X attempts 94 questions and gets 141 marks. If for every correct answer 4 marks is given, and for every wrong answer 1 mark is deducted, then the number of questions wrongly answered by X is __.

A) 45	B) 47
C) 57	D) 40

Quantitative Aptitude - Arithmetic Ability Questions

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