Quantitative Aptitude - Arithmetic Ability Questions

Q:

The standard deviation of the set {10, 10, 10, 10, 10} is

A) 0 B) 1
C) 5 D) 10
 
Answer & Explanation Answer: A) 0

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Q:

Simplify : 213 - 112 of 35 + 125 ÷ 213

A) 1/10 B) 3/10
C) 11/10 D) 1
 
Answer & Explanation Answer: C) 11/10

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Q:

If tanα = 2 - 1, then the value of  tanα - cotα = ?

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

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Q:

P + Q = 2(P-Q). If Q = 10, what is the value of P?

A) 10 B) 40
C) 20 D) 30
 
Answer & Explanation Answer: D) 30

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Q:

From the top of a platform, the angle of elevation of a tower was 30 deg. The tower was 45 mts high and the horizontal distance between the platform and the tower was 40√3 m. What was the height of the platform?

A) 40 m B) 5 m
C) 45√3 m D) 20√3 m
 
Answer & Explanation Answer: B) 5 m

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Q:

A box of 20 items was bought for Rs. 6,400 after a discount of 20%. Find the cost of each item.

A) Rs. 300 B) Rs. 350
C) Rs. 400 D) Rs. 450
 
Answer & Explanation Answer: C) Rs. 400

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Q:

A boy walking at the speed of 4 km/hr covers a certain distance in 6 hours 15 minutes. If he covers the same distance by cycle in 5 hours, then what is the speed (in km/hr) of the cycle?

 

 

A) 4.5 B) 5  
C) 6   D) 6.5
 
Answer & Explanation Answer: B) 5  

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Q:

P does half as much work as Q in 1/3 of the time. If together they take 15 days to complete a work, how many days will P take to do it alone?

 

A) 18   B) 25  
C) 24   D) 21
 
Answer & Explanation Answer: B) 25  

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