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If one-third of one-fourth of a number is 15, then three-tenth of that number is:

35
36
45
54

Correct Answer: 54

Explanation:

Let the number be x.

Then,	1	of	1	of x = 15 ⟺ x = 15 x 3 x 4 = 180.
	3		4

So, required number =	❨	3	x 180	❩	= 54.
		10

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