Question

_+_+_+_+_=30this ans is (7-1)+5+5+1+13=30is it correct? by using this numbers.. 1,3,5,7,9,11,13,15

Answer 1

its correct but u can write this one also
(5-1)+7+3+11+5

Answer 2

Odd numbers don't add up to give you an even number.
It is possible only in case of factorial.

3!+1+3+13+7=30 

3!+3!+3!+3!+3!=30