6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

What is the simplified value of $\sqrt{\frac{{(0.07)}^{2} + {(0.29)}^{2} - 0.0203}{{(0.07)}^{3} + {(0.29)}^{3}}}$

A) 0.6	B) 0.06
C) 1/0.6	D) 1/0.06

Answer & Explanation Answer: C) 1/0.6

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Filed Under: Simplification
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Q:

In an army selection process, the ratio of selected to unselected was 3:1. If 60 less had applied and 30 less selected, the ratio of selected to unselected would have been 5:1. How many candidates had applied for the process?

A) 240	B) 480
C) 120	D) 720

Answer & Explanation Answer: A) 240

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Filed Under: Ratios and Proportions
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Q:

The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?

A) 56	B) 65
C) 62	D) 69

Answer & Explanation Answer: C) 62

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Filed Under: Numbers
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Q:

The line passing through (3,4) and (0,3) is perpendicular to the line passing through (5,7) and (4,x). What is the value of x?

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

Answer & Explanation Answer: A) 4

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Filed Under: Area
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Q:

Which of the following quadratic equations has real roots?

A) 4x2 - 9x + 6 = 0	B) 3x2 - 2x + 6 = 0
C) 2x2 - 7x + 6 = 0	D) x2 - 2x + 2 = 0

Answer & Explanation Answer: C) 2x2 - 7x + 6 = 0

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Q:

If sin -330° = x, then the value of x is

A) √3/2	B) 1/2
C) -2/√3	D) √2

Answer & Explanation Answer: B) 1/2

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Q:

If (tanA - tanB)/(1 + tanAtanB) = x, then the value of x is

A) tan(A - B)	B) tan(A + B)
C) cot(A - B)	D) cot(A + B)

Answer & Explanation Answer: A) tan(A - B)

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Q:

The surface area of a sphere is 1386 $c m^{2}$ . Find its diameter (in cm)

A) 10.5	B) 42
C) 21	D) 31.5

Quantitative Aptitude - Arithmetic Ability Questions

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