6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

If (x+1/x) = 5, then the value of $\frac{5 x}{x^{2} + 5 x + 1}$ ?

A) 1/3	B) 1/4
C) 1/2	D) 1/5

Answer & Explanation Answer: C) 1/2

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Q:

If x - y = 6 and xy = 40, then find $x^{2} + y^{2}$ ?

A) 116	B) 80
C) 89	D) 146

Answer & Explanation Answer: A) 116

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Q:

A rectangular swimming pool of length 20 m and breadth 10 m has a uniformly sloping floor. It is 1 m in depth on one end of its length and 3 m at the other. How much water is needed to completely fill this pool? (Take π = 22/7)

A) 800 cubic metres	B) 300 cubic metres
C) 480 cubic metres	D) 400 cubic metres

Answer & Explanation Answer: D) 400 cubic metres

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Filed Under: Area
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Q:

If x - y = -6 and x + y = 16, then $x^{2} - y^{2}$ is?

A) 96	B) -96
C) 22	D) -22

Answer & Explanation Answer: B) -96

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Q:

A bag has Rs 20 in the form of 1-rupee, 50-paise and 10-paise coins in the ratio of 2:3:5. Find the number of 50-paise coins.

A) 25	B) 10
C) 15	D) 5

Answer & Explanation Answer: C) 15

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Filed Under: Ratios and Proportions
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Q:

Find the odd number from the given alternatives.

A) 16	B) 4
C) 2	D) 36

Answer & Explanation Answer: B) 4

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Q:

Choose the most appropriate answer:A boat travels upstream from B to A and downstream from A to B in 3 hours. If the speed of the boat in still water is 9 Km/h and the speed of the current is 3 Km/h, the distance between A and B is

A) 9 km	B) 10 km
C) 11 km	D) 12 km

Answer & Explanation Answer: D) 12 km

Explanation:

Speed of boat in still water = 9 km/hr

Speed of current = 3km/hr

Downstream speed = 9+3 = 12 km/hr

Upstream speed = 9-3 =6 km/hr

Let the distance between A to B be x km.

x/6 + x/12 = 3x + 2x = 36
3x = 36
x = 12 km

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Q:

X and Y give an exam. Difference of their marks is 45 and the difference of their marks is 15% of the maximum marks. What is the maximum marks for the exam?

A) 180	B) 450
C) 150	D) 300

Quantitative Aptitude - Arithmetic Ability Questions

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