Question

_ + _ + _ = 30.
Use 1, 3, 5, 7. 9, 11, 13, 15
One can use number twice

Answer 1

3! + 11 + 13 = 30

! = This is a factorial sign.

3! means = 3*2*1 = 6

That means 6 + 11 + 13 = 30