Instructions

In the following number series only one number is wrong. Find out the wrong number.

Question 115

9, 5, 6, 10.5, 23, 61, 183

Solution

The series follows the following pattern:

9 * 0.5 + 0.5 = 5

5*1 + 1 = 6

6 * 1.5 + 1.5 = 10.5

10.5 * 2 + 2 = 23

23 * 2.5 + 2.5 = 60

60 * 3 + 3 = 183

Hence, 61 is the incorrect number.

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