Lessons

General Aptitude
18.4 Odd Man Out and Series - Find Wrong No.

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Q.

Find out the wrong number in the series.
3, 7, 15, 39, 63, 127, 255, 511

View Answer

Correct choice: C

Explanation:

Go on multiplying 2 and adding 1 to get the next number.

So, 39 is wrong.

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