Find the wrong number from the following series ? 7 18 40 106 183 282 403 18 183

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Question
Find the wrong number from the following series ? 7 18 40 106 183 282 403
Options
A. 18
B. 183
C. 40
D. 106

Correct Answer

40

Explanation

The given series follows the rule,
+(11x1), +(11x3), +(11x5), +(11x7), +(11x9),....

So starting from 7, 7 + 11 = 18, 18 + 33 = 51, 51 + 55 = 106, ...
So wrong number is 40 which is to be 51.

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