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Q:

The mean of the data 1, 2, 10, 18, 3, 17, 19 is

A) 7 B) 10
C) 17 D) 70
 
Answer & Explanation Answer: B) 10

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Filed Under: Average
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Q:

India - Pakistan Kargil war code name is ____.

A) Operation Blue Star B) Operation Vijay
C) Operation Viraat D) Operation Kargil
 
Answer & Explanation Answer: B) Operation Vijay

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Filed Under: Indian History
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Q:

A rocket is launched to travel vertically upward with a constant velocity of 20 m/s. After travelling for 35 seconds, the rocket develops a snag and its fuel supply is cut off. The rocket then travels like a free body. The height achieved by it is

A) 680 m B) 720 m
C) 800 m D) 700 m
 
Answer & Explanation Answer: B) 720 m

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Filed Under: Physics
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Q:

An 80 litre mixture of water and acid contains 20% acid. How much acid should be added to make the acid 60% in the new mixture?

 

 

A) 60 B) 80
C) 70 D) 90
 
Answer & Explanation Answer: B) 80

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Filed Under: Alligation or Mixture
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Q:

A sum of Rs 6000 becomes Rs 7200 in 2 years, when invested in a scheme of simple interest. If the same sum is invested in a scheme of compound interest with same yearly interest rate (compounding of interest is done yearly), then what will be the amount (in Rs) after 3 years?

 

A) 7434   B) 8244  
C) 7864   D) 7986
 
Answer & Explanation Answer: D) 7986

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Filed Under: Compound Interest
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Q:

If (tanA ­- tanB)/(1 + tanAtanB) = x, then the value of x is

A) tan(A -­ B) B) tan(A + B)
C) cot(A ­- B) D) cot(A + B)
 
Answer & Explanation Answer: A) tan(A -­ B)

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Filed Under: Simplification
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Q:

Acceleration due to gravity on a planet decreases with ______.

A) decrease in radius of the planet B) increase in mass of the planet
C) decrease in mass of the body D) increase in altitude from surface of the planet
 
Answer & Explanation Answer: D) increase in altitude from surface of the planet

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Filed Under: Physics
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Q:

The sum of the ages of husband and wife at present is 60. Four years ago the ratio of their ages was 7:6. What is the age of the husband?

A) 28 years B) 32 years
C) 42 years D) 38 years
 
Answer & Explanation Answer: B) 32 years

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Filed Under: Problems on Ages
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