What is the sum of three numbers that equal 15?

Answer 1

Oh, dude, you're hitting me with a math question? Alright, so if three numbers add up to 15, you could have 5, 5, and 5. Boom, 15! Or you could get all fancy and do like 4, 6, and 5. Still ends up being 15. Math, man, it's wild.

Answer 2

If you mean the numbers are all 15 then the answer is 45 otherwise the answer is the 15 that you already stated in your question to be the sum.