The World's 23 Toughest Math Problems

Math phobics beware, The Defense Advanced Research Projects Agency (DARPA) have put out a research request it calls Mathematical Challenges. If you think you're ready to tackle even one of the 23 challenges I wish you the very best of luck and not only that, you'd be offering a mathematical breakthrough! Sound tempting?

Here are the 23 World's Toughest Math Problems.