Question

_+_+_=30 only use num 1, 3, 5, 7, 9, 11, 15

Answer 1

first of all you at the old number and divide 15 into all you can add and next time you can multiply in 2 3 next time you can press 5 now your answer is 30

Answer 2

11+9+(15-5)=30.

Hope it hlps:)