Which number in the given series is Incorrect?
3, 7, 15, 27, 53, 63

Options

A. 1.53
B. 2.63
C. 3.27
D. 4.7

Answer

A

Explanation

`7−3 = 1 xx 4`
` 15−7 = 2 xx 4`
` 27−15 = 3 xx 4`
` 43−27 = 4 xx 4`
63−43 = 5 xx 4`
So, it should be 43 instead of 53 in the given series.
A is correct choice.