Question

if their are three empty box so what shold be added in them to get 30 without using even numbers

Answer 1

it is impossible
odd+odd=even+odd=odd only we can't get even number(30)

Answer 2

19 + 11 + 0.

19 and 11 are odd. And 0 is neither odd nor even. So they are 30.

MARK AS BRAINLIEST.