Quantitative Aptitude - Arithmetic Ability Questions

Q:

A can do a piece of work in 20 days and B in 15 days. With help of C, they finish the work in 5 days. C can alone do the work in

A) 5 days B) 6 days
C) 10 days D) 12 days
 
Answer & Explanation Answer: D) 12 days

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Q:

What is the average of all numbers between 100 and 200 which are divisible by 13?

A) 147.5 B) 145.5
C) 143.5 D) 149.5
 
Answer & Explanation Answer: D) 149.5

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Filed Under: Average
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Q:

The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is:

A) 161 B) 162
C) 163 D) 164
 
Answer & Explanation Answer: B) 162

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Q:

Solve 675.9995+(3.9989)2 = ? ÷ 16.9900865

A)

6

B)

50

C)

10

D)

125

 
Answer & Explanation Answer: A)

6



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Q:

If a - b = 2 and ab = 8, then what is the value of a3 - b3?

A) 65 B) 34
C) 43 D) 56
 
Answer & Explanation Answer: D) 56

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Filed Under: Simplification
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Q:

If  tan2A / (secA -­ 1)2 = x, then the value of x is

A) (1+cosecA) / (1­-cosecA) B) (1+cosA)(1-­cosA)
C) (1+cosA) / (1­-cosA) D) (1+cosecA)(1­-cosecA)
 
Answer & Explanation Answer: C) (1+cosA) / (1­-cosA)

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Q:

The area of an equilateral triangle is 9√3 sq cm, find its perimeter?

A) 18 cm B) 9 cm
C) 9√3 cm D) 6√3 cm
 
Answer & Explanation Answer: A) 18 cm

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Q:

The length of a string is 8 feet and 9 inches, which is divided into 3 equal parts. What is the length of each part in inches?

A) 31 B) 33
C) 35 D) 37
 
Answer & Explanation Answer: C) 35

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