Question

_+_+_=30(1,3,5,7,9,11,13,15)

Answer 1

It is not possible because sum of three odd numbers is always a odd number

Answer 2

no it is not possible as sum of any three odd numbers is always odd number but 30 is an even number. if we add any three odd number we can't get even number as answer as odd+odd+odd= odd
and odd+ odd+even or even+even+even = even.