Through this post on reddit.com, I have learned some interesting ways knowing some more math can benefit us in our everyday lives. For example, One would normally not assume that a 14 inch pizza is that much larger than a 10 inch pizza. Normally, these 14 inch pizzas aren't much more expensive than the 10 inch ones. However, it is twice the size, and can be confirmed with a little bit of math! This is one of the many math life "hacks" one can observe from the commenters on this post. However, don't believe just believe everything you read, but confirm it yourself by doing some math. Some of these facts might be useful in your life later on.

http://us.reddit.com/r/math/comments/mn4bj/a_14_pizza_has_twice_as_much_pizza_as_a_10_pizza/