Instructions

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

Question 173

8, ?, 30, 105, 472.5, 2598.75, 16891.875

Solution

The third number is multiplied by 3.5 to get the fourth number. The fourth number is multiplied by 4.5 to get the fifth number. Hence, the first number must have been multiplied by 1.5 to get the second number.
8*1.5 = 12
Option C is the right answer.


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