What should come in place of the question mark (?) in the following number series ?
8, ?, 30, 105, 472.5, 2598.75, 16891.875
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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