The viral math problem has X users stumped - but the answer comes in lessons learned in fifth or sixth grade.

In grade school, you were constantly drilled on mathematics. But as an adult, those lessons all too often fall to the wayside ...

NARRATION:Back in the deepest, darkest depths of time, there lived a great mathemagician called Hypatia. Numbers fell under her spell one by one. With them, Hypatia could do anything. Now Hypatia is ...

An operation is a mathematical process. Common examples are addition (+), subtraction (-), multiplication (x) or division (÷). An inverse operation is the opposite of the operation used in the ...