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Question
In following questions, one term in number series is incorrect.
Find out the incorrect number 3, 7, 15, 39, 63, 127, 255, 511
In following questions, one term in number series is incorrect.
Find out the incorrect number 3, 7, 15, 39, 63, 127, 255, 511
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Solution
The correct option is B 39
Each number in the series is multiplied by 2 and the result increased by 1 to obtain the next number.
So, 39 is wrong and should be replaced by (15 * 2 + 1) i.e. 31.
Each number in the series is multiplied by 2 and the result increased by 1 to obtain the next number.
So, 39 is wrong and should be replaced by (15 * 2 + 1) i.e. 31.
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