24点是把4个整数（一般是正整数）通过加减乘除运算,使最后的计算结果是24的一个数学游戏,可以考验人的智力和数学敏感性.通常是使用扑克牌来进行游戏的,一副牌中抽去大小王后还剩下52张（如果初练也可只用1～10这40张牌）,任意抽取4张牌（称为牌组）,用加、减、乘、除（可加括号）把牌面上的数算成24.每张牌必须且只能用一次,如抽出的牌是3、8、8、9,那么算式为（9—8）×8×3或3×8÷（9—8）或（9—8÷8）×3等.
24 points to 4 integer (usually a positive integer) multiplication and division through addition and subtraction, so that the final results of a mathematical game is 24, you can test the sensitivity of human intelligence and mathematics. Is usually used for poker games, a card the size of the queen in removing remaining 52 (if the beginning of training can be only 1 to 10 of these 40 cards), any extract four cards (called the deck ), with addition, subtraction, multiplication, and division (can be added in parentheses) the number of face cards count as 24. Each card must and can only be used once, such as taking the card is 3,8,8,9, then the formula for the (9-8) × 8 × 3 or 3 × 8 ÷ (9-8) or (9-8 ÷ 8) × 3 and so on