Aptitude and Reasoning Questions

Q:

The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?

A) 10 B) 11
C) 8 D) 9
 
Answer & Explanation Answer: D) 9

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Filed Under: Average
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Q:

If 5(4­-x) - ­4 < 3x - ­2 > 4x - 6; then the value of x is

A) 3 B) 1
C) 2 D) 5
 
Answer & Explanation Answer: A) 3

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Q:

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

 

11, 121, 1331, 14641, ?

 

A) 16051 B) 161051
C) 131769 D) 29282
 
Answer & Explanation Answer: B) 161051

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Filed Under: Number Series
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Q:

If (4x -­ 5) = (3x ­- 1), then the numerical value of (x + 4)2

A) 16 B) 64
C) 32 D) 8
 
Answer & Explanation Answer: B) 64

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Q:

A rectangular swimming pool of length 20 m and breadth 10 m has a uniformly sloping floor. It is 1 m in depth on one end of its length and 3 m at the other. How much water is needed to completely fill this pool? (Take π = 22/7)

A) 800 cubic metres B) 300 cubic metres
C) 480 cubic metres D) 400 cubic metres
 
Answer & Explanation Answer: D) 400 cubic metres

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Filed Under: Area
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Q:

An alloy is made by mixing metal A costing Rs 2000/kg and metal B costing Rs 400/kg in the ratio A:B = 3:1. What is the cost (in Rs) of 8 kilograms of this alloy?

A) 1600 B) 9800
C) 6400 D) 12800
 
Answer & Explanation Answer: D) 12800

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Filed Under: Alligation or Mixture
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Q:

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

A) acDD B) egHH
C) ikLL D) QSTt
 
Answer & Explanation Answer: D) QSTt

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Filed Under: Odd Man Out
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Q:

What is the value of tan 7π/6?

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

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