6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

The mean of a distribution is 15 and the standard deviation is 5. What is the value of the coefficient variation?

A) 16.66%	B) 66.66%
C) 33.33%	D) 100%

Answer & Explanation Answer: C) 33.33%

Explanation:

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Filed Under: Probability
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Q:

If $θ$ is positive acute angle and $7 \cos^{2} Ɵ + 3 \sin^{2} Ɵ = 4$ , then the value of $θ$ is

A) 60°	B) 30°
C) 45°	D) 90°

Answer & Explanation Answer: A) 60°

Explanation:

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Q:

If x, y, z are the three factors of $a^{3} - 7 a - 6$ , then value of x+y+z will be

A) 3a	B) 3
C) 6	D) a

Answer & Explanation Answer: A) 3a

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Q:

Two equal circles intersect such that each passes through the centre of the other. If the length of the common chord of the circles is 10√3 cm, then what is the diameter of the circle?

A) 10 cm	B) 15 cm
C) 20 cm	D) 30 cm

Answer & Explanation Answer: C) 20 cm

Explanation:

Let there be 2 circles with centre O1 and OAB is the common chord

Since both passes through the center of each other as shown in figure

So O1O is the radius of both

Let O1O = r = AO1= AO

AX = AB / 2 = 5√3 cm (since OX perpendicular to chord bisects it)

AOO1 forms an equilateral triangle with on side = radius = r

Sin 60 = √3/2 = AX / AO = 5√3/r

So r = 10 cm

So diameter = 20 cm

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Exam Prep: Bank Exams

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Q:

Find the area (in sq units) enclosed by y = 0, x+6=0 and 2x-3y=6.

A) 9	B) 16
C) 20	D) 27

Answer & Explanation Answer: D) 27

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Filed Under: Area
Exam Prep: Bank Exams

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Q:

Select the odd number from the given alternatives.

A) 341	B) 342
C) 810	D) 405

Answer & Explanation Answer: A) 341

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Filed Under: Odd Man Out
Exam Prep: Bank Exams , CAT

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Q:

Select the odd word/letters/number/number pair from the given alternatives.

A) XAD	B) PRU
C) JLO	D) ACF

Answer & Explanation Answer: A) XAD

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Q:

The average of four consecutive odd numbers is 64. What is the value of largest number?

A) 65	B) 69
C) 71	D) 67

Quantitative Aptitude - Arithmetic Ability Questions

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