Here’s another clever math trick that might make you look at numbers a little differently. See if you can figure it out.

Add Yahoo as a preferred source to see more of our stories on Google. It seemed that many were quick to figure out the equation, while others definitley struggled. You're never too old to learn ...

Add Yahoo as a preferred source to see more of our stories on Google. Math shouldn't be harder than finding the last matching sock in your laundry. These clever shortcuts convert head-scratching ...