Question

_+_+_=30.

option→ 5 to 15 all odd numbers​

Answer 1

1. even number. i.e. 30 in this case. Hence, the question is wrong.

2. Then there are people who are using decimals to solve this. For example -

13.3+15.7+1=30

3. An interviewer asked me this question and this was his answer. (Using other mathematical expressions) - 3! + 11 + 13 = 30

Conclusion - The question needs to be more specific. If you play around with these numbers, there will be infinite number of ways to solve this.