Recently, a new type of challenge has appeared on the net, although the quizzes themselves are not particularly new. It’s about good old-school mathematics. Trying this kind of challenge is exciting and fun, especially if it has been a bunch of...

Could you give your brain some training by trying to solve this math test? Do you think you're smart enough to answer this question without looking up the answer? Don't underestimate it, most people will get it wrong initially! If you get...