Instructions

What should come in the place of question mark (?) in the following number series ?

Question 87

4, 6, 9, 13.5, 20.25, 30.375, ?

Solution

Each number in the given number series equals 1.5 times the previous number.

For example, 4*1.5 = 6
6*1.5 = 9
9*1.5 = 13.5
13.5*1.5 = 20.25
20.25*1.5 = 30.375

Hence, the number to come next is 30.375*1.5 = 45.5625 which is option (b)


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