Question

sum of two evens number is even but why some of two odd no is even explain?

Answer 1

Ya it is even if you add 3+3 you get 6 so it is even so there isno reason in maths why it is even maths is all about practical amd we have seen that odd+odd=even

Answer 2

An odd number is an even number plus one. So an odd number can be represented with 2k+1 or 2j+1 (some number j or k multiplied by 2 plus 1). If you add two such numbers: 2j+1 + 2k+1 2j+2k + 1+1 2(j+k) + 2 the left bit is the even part; the 1+1 is the sum of the odd parts; but 1+1 always equals 2 so it can never become an odd number.