24点游戏

What is 24 o 'clock?
"Twenty-four points" refers to the twenty-four point game. The rules of the game are: add, subtract, multiply and divide four numbers, then mix the operation (allow the use of parentheses) so that the result is 24. It is a simple yet challenging math practice game for smart people.
Example :4, 4, 3, 5,
Have you figured out how to calculate it yet?
4×4+3+5=24, (4+5-3) ×4=24(Each number can only be used once).
24 points can test people's intelligence and mathematical sensitivity, it can improve people's mental arithmetic ability in the game.