But math puzzles like this go viral because they ... multiplication, division, addition, subtraction. And a good mnemonic device to keep that straight is “Please Excuse My Dear Aunt Sally.” ...

Experience math in a whole new way. We'll play fun and challenging problem-solving games and puzzles from around the world, including Ancient China and Egypt, Europe, Asia, Africa and the Americas. We ...

This math puzzle brainteaser challenges readers to find the missing value in a simple arithmetic problem. Using the BODMAS rule, solve 6 + 6 + 6 + 6 * 0 within five seconds. Solving such puzzles ...

But math puzzles like this go viral because they ... Then, we move on to addition and subtraction, also working from left to right: 16-1=15. Finally, we add the last 4: 15+4=19.