What is (_) +(_) +(_) = 30. Fill the blanks using the numbers 1, 3, 5, 7, 9, 11, 13 and 15.

We know that some of the od numbers can never be even. Let us look at a few mathematical operations that will help us arrive at this number.

Answer: (_) +(_) +(_) = 30 the blanks can be filled in may different ways using the numbers 1, 3, 5, 7, 9, 11, 13 and 15.

Explanation:

Let us look at few options

We can use a factorial of 3 to fill one of the blanks.

So, 3! + 7 + 17 = 30, 3! + 9 + 15 = 30, and 3! + 11 + 13 = 30

Another way is to use multiple operations.

15 + (1 + 9) + 5 = 30, 13 + (1 + 9) + 7 = 30, 11 + (13 – 3) + 9 = 30 and 13 + (15 – 5) + 7 = 30

Thus, the different ways  to fill  (_)+(_)+(_)  = 30  are  3! + 7 + 17 = 30, 3! + 9 + 15 = 30, 3! + 11 + 13 = 30, 15 + (1 + 9) + 5 = 30, 13 + (1 + 9) + 7 = 30, 11 + (13 – 3) + 9 = 30 and  13 + (15 – 5) + 7 = 30