1.  If one-third of one-fourth of a number is 15, then three-tenth of that number is :
A. 35
B. 36
C. 45
D. 54

Answer: Option D

Explanation:

Let the number be x.

Then, 1 of 1 of x = 15   
3 4

  x = 15 x 12 = 180.

So, required number = 		3 x 180 = 54.
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