Instructions

In the following number series, a wrong number is given. Find out that wrong number.

Question 138

7 9 16 25 41 68 107 173

Solution

The pattern here followed is :

7 + 9 = 16

9 + 16 = 25

16 + 25 = 41

25 + 41 = 66

41 + 66 = 107

66 + 107 = 173

Thus, 68 is wrong

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