Multiple choice If one-third of one-fourth of a number is 15, then three-tenths of that number is 35 36 45 54 None of these Reveal answer Fill a bubble to check yourself D Correct answer Explanation Correct answer. Let the number = x Then, 1/3 of 1/4 of of x = 15 x = 15 x 12 x = 180 So, the required number = (3/10) * 180 = 54