If you think you're a math expert, try out these hard math problems ... Not everyone has their 25 times table memorized, but ...

Hard Problems is about the extraordinary gifted students who represented the United States in 2006 at the worlds toughest math competition The International Mathematical Olympiad IMO It is the ...

take heart—most of these hard math problems just use very simple numbers with only basic operations—addition, subtraction, multiplication, and division. What makes them a challenge is often ...