Exercise your mind with the challenging problem sets at Project Euler. Designed to provide a fun way to introduce new concepts , the frequently asked questions section of Project Euler has this to say ...

Have you ever been curious about why the number e is so popular in math? Euler’s number, which is an infinitely long decimal, close to 2.71828, pops up naturally in a surprisingly broad range of ...

Euler's identity: Math geeks extol its beauty, even finding in it hints of a myste­rious connected­ness in the universe. It's on tank tops and coffee mugs. Aliens, apparently, carve it into crop ...