24 - Mental Math Game

24 points is a classic and interesting math game. The game is designed to help people improve their arithmetic abilities and mental math skills. Elementary school students can also play it. But you may not solve some questions even you are a graduate student! ■ HOW TO PLAY The rule is very simple. Combine 4 numbers into 24 by addition(+), subtraction(-), multiplication(x) and division. For exam…