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, 27, 63, 127, 255

View Answer

Correct choice: C

Explanation:

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

So, 27 is wrong.

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