Please help I really really really need lots and lots and lots of HELP!!!!!!!!!!!!!!!

You can come up with this easily, once you ask yourself what makes 45? The answers you are looking for are 3, 5, 9, and 15....but you need to be able to show how you got those answers! With math, proof of how you got the answer is just as improtant as getting the correct answer. Hope I could help. -Amanda-