When brain teasers involve numbers, it can get tricky. For some reason, your brain begins to second guess itself. This brain teaser isn't as hard as you'd think.
Some people see brain teasers as a way to get your brain going. It helps you forget the deadlines, tests, or other bs going on. It relaxes your brain and gives you a fresh start to the day's work. So let's see how good you are at math!