Math Fun Facts!

Math Fun Facts app is #113 in Education in US, Top 100 in Brazil, Israel, Top 50 in Bulgaria, Croatia

The new Math Fun Facts app has been doing well in the App Store charts but we could use your help in pushing it into the Top 100 lists in your country. Thanks for letting your friends know about it!

Math Fun Facts app now in App Store!

The new Math Fun Facts app is now in the App Store! Get your dose of Fun Facts on plane, train, anywhere... no internet needed! Rate and sort or get a random Fun Fact. Tell your friends!

Are Coins Fair?

When you flip a coin, what are the chances that it comes up heads? If the coin is "fair" then we expect to see heads 50 percent of the time. But is this really the case?...

Does Order of Addition Matter?

From your earliest days of math you learned that the order in which you add two numbers doesn't matter:...

Rational Irrational Power

If you raise an irrational number to a rational power, it is possible to get something rational. For instance,...

Dominoes on a Chessboard

A standard 8x8 chessboard can easily be covered (tiled) with non-overlapping dominoes (1x2 pieces): simply use...

Domino and Square Tilings

How many ways can you tile a (1 x n) board with (1 x 1) squares and (1 x 2) dominoes?...

Continuous but Nowhere Differentiable

You've seen all sorts of functions in calculus. Most of them are very nice and smooth--- they're "differentiable",...

Hairy Ball Theorem

Another fun theorem from topology is the Hairy Ball Theorem. It states that given a ball with hairs all over...

Cantor Set

Start with the interval [0,1]. Remove the (open) middle third of it, i.e. get (1/3, 2/3)....

Liouville Numbers

Are there any real numbers that are NOT algebraic, i.e., expressible as the root of a non-zero polynomial with integer coefficients? ...

Sum of Cubes

The sum of cubes is just the square of the triangular numbers! ...