Lessons

General Aptitude
18.3 Odd Man Out and Series - Missing No.

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Q.

Insert the missing number.
7, 26, 63, 124, 215, 342, (....)

View Answer

Correct choice: B

Explanation:

Numbers are (23 - 1), (33 - 1), (43 - 1), (53 - 1), (63 - 1), (73 - 1) etc.

So, the next number is (83 - 1) = (512 - 1) = 511.

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