Arrange the words given below in a meaningful sequence.    1. Atomic Age    2. Metallic Age    3. Stone Age    4. Alloy Age

[B].

[C].

[D].

Answer: Option C

Explanation:

Clearly, we have :

B-3 = E …(i)

B + 3 = D …(ii)

A+B = D + E+10 …(iii)

B = C + 2 …(iv)

A+B + C + D + E= 133 …(v)

From (i) and (ii), we have : 2 B = D + E …(vi)

From (iii) and (vi), we have : A = B + 10 …(vii)

Using (iv), (vi) and (vii) in (v), we get:

(B + 10) + B + (B – 2) + 2B = 133 5B = 125 B = 25.

[B].

[C].

[D].

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.