Difficult Maths Question!!!!

i got this question in an email. i was unable to solve it. i hope any one of u can solve it!!! . here is the question:


we know that: 1+3+5+7+9+11+13+15+17+19=100
out of these 10 numbers, which 5 numbers sum up to 50??????
use your brain, its a challenge!!!!!!!

CAN ANYONE SOLVE THIS MATHS QUESTION?

5 odd numbers can never produce a result in even.

odd + odd = even
odd + odd + odd = odd
odd + odd + odd + odd = even
odd + odd + odd + odd + odd = odd

simple