Question

❓➕❓➕❓=30

1 ,3 ,5 ,7 ,9, 11, 13 ,15

यापैकी अंक वापरा
कोणताही अंक कितीही वेळा वापरा

Answer 1

it is not defineable as odd + odd + odd is always an odd number not an even number.

Answer 2

In general it is undefinable . But 1 solution is 
(3 weeks + 1 week)+1 day + 1 day = 30 days .