In grade school, you were probably constantly drilled on mathematics. Whether it be multiplication tables, simple addition, or complicated division, it was taught over and over again that quick math ...

While most adults are more than happy to be a long way away from their school exams, many of us enjoy challenging ourselves with a quiz or a puzzle. Keeping your mind sharp as you get older becomes ...

It's a deceptively simple arithmetic problem that has left millions scratching their heads. And no one can agree on the correct answer despite its lack of large figures or intricate calculations. The ...