A grade-school math problem has stumped people. Can you solve the equation?

This is called repeated addition. You add the same number lots of times. This can also be written as a multiplication calculation. There are five equal groups of two. The five represents the number of ...

What they are: A logarithm is the exponent you raise a base to in order to get a number, acting as the inverse of exponentiation. Why they matter: They simplify multiplication, division, and roots ...