Question

Can you solve _ + _ + _ = 30 using 1, 3, 5, 7, 9, 11, 13 and 15?

Answer 1

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

11+1+3+15=30

3! + 15 + 9 = 30

Answer 2

(11+1) / 3 + 15 + 11 = 30