One term in the number series is wrong. Find out the wrong term.
3, 7, 15, 39, 63, 127, 255, 511
One term in the number series is wrong. Find out the wrong term.
3, 7, 15, 39, 63, 127, 255, 511 Correct Answer 39
So, 39 is wrong and must be replaced by (15 x 2 + 1) i.e. 31.
