Question

Which number completes the Pythagorean triple: 12,16____? 18 20 22 24

Answer 1

Twenty...............

Answer 2

The first thing that would probably come to mind when solving this problem would be to plug in the numbers into the equations. Like this  12^2 + 16^2 = x^2 (X = to the number that you plug in from the answer bank.). This is correct thinking so you can try this:

144 + 256 = 400.

So your square has to be equal to 400.

And it most common knowledge that the square root of 400 is equal to 20.

So your answer is 20.