Question

Using deductive logic prove that the sum of two odd numbers is an even number.

Answer 1

3+3=6
6 is also an even number

Answer 2

let 2x+1 and 2y+1 be two odd numbers
then ,
(2x+1)+(2y+1)
=2x+2y+2
=2 (x+y+1)
since a number multiplied by 2 can't be odd
that's why proved sum of two odd numbers is always a even