Question

1,3,5,7,9, 13,11,15 are given then solv ( )+ ( ) +( )=30 hint you can repeat the numbers

Answer 1

if we repeat the no.s ,we will get an even no. then we again need an even no. which is not here.so we cannot complete it by 3 no.s,
with 2 no.s,15+15=30
with 4 no.s,11+13+5+1=30

Answer 2

You can not add three odd numbers to get an even value. So use factorial

3! + 15 + 9 = 30
3! + 13 + 11 = 30