Aptitude and Reasoning Questions

Q:

The mean of 14 observations is 11. One more observation is included and the new mean becomes 12. The 15th observation is

A) 20 B) 24
C) 26 D) 28
 
Answer & Explanation Answer: C) 26

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Q:

Anuj runs 1 2/3 laps of 7 laps race, find the remaining laps to be run.

A) 16/3 B) 14/3
C) 11/3 D) 10/3
 
Answer & Explanation Answer: A) 16/3

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Q:

The sum of 2xy(3x + 4y - 5z) and 5yz(2x - 3y) is

A) 6x2y - 8xy2 + 15y2z B) 6x2y + 8xy2 - 15y2z
C) 6x2y + 8xy2 - 15y2z - 20xyz D) 6x2y - 8xy2 + 15y2z + 20xyz
 
Answer & Explanation Answer: B) 6x2y + 8xy2 - 15y2z

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Q:

What is the simplified value of 18 - 12 ?

A) 5/√2 B) 5√2
C) 2√5 D) 2/√5
 
Answer & Explanation Answer: A) 5/√2

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Q:

What is the value of cos (90 – B) sin (C – A) + sin (90 + A) cos (B + C) – sin (90 – C) cos (A + B)?

A) 1 B) sin ( A + B – C)
C) cos ( B + C – A) D) 0
 
Answer & Explanation Answer: D) 0

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Q:

If 40 is 0.05% of x, then what is the value of x?

A) 80000 B) 8000
C) 800 D) 80
 
Answer & Explanation Answer: A) 80000

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Q:

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

-7/4, -1, -0.25, ? , 5/4, 2

A) 0.5 B) 0.75
C) 0.25 D) 1
 
Answer & Explanation Answer: A) 0.5

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Q:

Find the curved surface area (in cm2) of a right circular cone of diameter 28 cm and slant height 12 cm.

 

A)  792 B) 728
C)  528 D)  493
 
Answer & Explanation Answer: C)  528

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