There's a new Guinness World Record holder for how fast someone can do math. Aaryan Shukla — who has been dubbed "the human calculator" can solve complex problems in his head in seconds. OK, Ari, what ...

Ever dreamt of solving math problems in your head with the speed of a calculator? Mental math might seem challenging, but it's a skill attainable through the right tools and techniques. The abacus, an ...