Answers

2014-09-01T22:22:14+08:00
Probably 2.

If you multiply me by myself...

Let's replace that statement with x

The product is equal if you double me once.

That would now be an equation, which is:

x^2 = 2x

If x = 2, then:

2^2 = 2 (2) \\ 4 = 4
1 5 1
mine is 1 because if you multiply 1 by itself the prudoct is still equal if you double me once