Question

If n is an even number,all of the following must also be even except

Answer 1

Answer:

$(a)\ n+1$

Step-by-step explanation:

Given

$n \to even$

Required

Which cannot be even

To do this, we assume an even number for n;

Assume that $n = 4$

So, we have:

$(a)\ n+1$

$n +1 = 4 + 1 = 5$ --- this is odd

$(b)\ n+2$

$n +2 = 4+2 = 6$ ---- this is even

$(c)\ 2n$

$2n = 2 * 4 = 8$ --- this is even

$(d)\ n^2$

$n^2 = 4^2 = 16$ --- this is even

Hence, (a) can't be even