Quantitative Aptitude - Arithmetic Ability Questions

Q:

In DEF measure of angle E is 90°. If secD = 25/7, and DE = 1.4cm, then what is the length (in cm) of side DF?

A) 5 B) 4.8
C) 4 D) 5.6
 
Answer & Explanation Answer: A) 5

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Q:

What is the value of sin 5π/3?

A) √3/2 B) 2/√3
C) 1/√3 D) -2/√3
 
Answer & Explanation Answer: A) √3/2

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Q:

ΔABC is similar to ΔPQR. Length of AB is 36 cm and length of the corresponding side PQ is 16 cm. If area of ΔABC is 1296 sq cm, what is the area of ΔPQR?

A) 128 sq cm B) 512 sq cm
C) 64 sq cm D) 256 sq cm
 
Answer & Explanation Answer: D) 256 sq cm

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Q:

The length of the diagonal and the breadth of a rectangle are 17 cm and 8 cm respectively. Find its perimeter (in cm).

A) 92 B) 46
C) 42 D) 84
 
Answer & Explanation Answer: B) 46

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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:

What is the value of (1+cosA)/(1-­cosA)?

A) (cosecA ­- cotA)2 B) (cosecA + cotA)2
C) (secA + cotA)2 D) (secA -­ cotA)2
 
Answer & Explanation Answer: B) (cosecA + cotA)2

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Q:

In a motor of 120 machine parts, 5% parts were defective. In another motor of 80 machine parts, 10% parts were defective. For the two motors considered together, the percentage of defective machine parts were

A) 7 B) 6.5
C) 7.5 D) 8
 
Answer & Explanation Answer: A) 7

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Q:

If a+bab=21 ,  then the value of (a-b) is

A) 1 B) 0
C) -1 D) 2
 
Answer & Explanation Answer: B) 0

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