Answer:

1 and 2

Step-by-step explanation:

if n is a positive integer

there are only two cases,

CASE 1:

N IS A ODD NUMBER

then (N+1) is even,

which means that it is divisible by 2.

CASE 2:

N IS EVEN NUMBER,

we all know that all even integers are divisible by 2.

∵ n is always divisible by 2