Quantitative Aptitude - Arithmetic Ability Questions

Q:

A solid sphere of radius 3 cm is melted to form a hollow right circular cylindrical tube of length 4 cm and external radius 5 cm. The thickness of the tube is

A) 1 cm B) 9 cm
C) 0.6 cm D) 1.5 cm
 
Answer & Explanation Answer: A) 1 cm

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Q:

The ratio of three numbers is 2 : 5 : 7. If their product is 1890, then what is the sum of the three numbers?

A) 82 B) 140
C) 42 D) 72
 
Answer & Explanation Answer: C) 42

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Filed Under: Ratios and Proportions
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Q:

Manjeet can do a work in 18 hours. If he is joined by Jaya who is 100% more efficient, in what time will they together finish the work?

A) 6 hours B) 3 hours
C) 12 hours D) 24 hours
 
Answer & Explanation Answer: A) 6 hours

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Q:

Convert binary 1101111 to decimal.

A) 111 B) 101
C) 110 D) 100
 
Answer & Explanation Answer: A) 111

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Q:

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

A) FLR B) KQW
C) PIB D) CIO
 
Answer & Explanation Answer: C) PIB

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Q:

If 2cosAsinB = x, then the value of x is?

A) sin(A+B) + sin(A­-B) B) cos(A+B) + cos(A­-B)
C) sin(A+B) ­- sin(A-­B) D) cos(A­-B) -­ cos(A+B)
 
Answer & Explanation Answer: C) sin(A+B) ­- sin(A-­B)

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Q:

If a cylinder of radius 4.3 cm and height 4.8 cm is melted and constructed into a cone of the same radius, what will be the height of this cone? (Use π = 22/7)

A) 28.8 cm B) 14.4 cm
C) 7.2 cm D) 21.6 cm
 
Answer & Explanation Answer: B) 14.4 cm

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Q:

A cylindrical vessel of height 5 cm and radius 4 cm is completely filled with sand. When this sand is poured out it forms a right circular cone of radius 6 cm. What will be the height of this cone? (Take π = 22/7)

A) 6.67 cm B) 2.22 cm
C) 3.33 cm D) 1.67 cm
 
Answer & Explanation Answer: A) 6.67 cm

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