Question

□ + □ + □ = 30 ?
Fill the box using
( 1,3,5,7,9,11,13,15 )

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