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Question: Nitin’s age was equal to square of some number last year and the following year it would be cube of a number. If again Nitin’s age has to be equal to the cube of some number, then for how long he will have to wait?
[A].

10 years

[B].

38 years

[C].

39 years

[D].

64 years

Answer: Option B

Explanation:

Clearly, we have to first find two numbers whose difference is 2 and of which the smaller one is a perfect square and the bigger one a perfect cube.

Such numbers are 25 and 27.

Thus, Nitin is now 26 years old. Since the next perfect cube after 27 is 64,

so required time period = (64 – 26) years = 38 years.

Question: If a clock takes seven seconds to strike seven, how long will it take to strike ten ?
[A].

7 seconds

[B].

9 seconds

[C].

10 seconds

[D].

None of these

Answer: Option D

Explanation: