10、10、9、6、算24点

玩法：从扑克中任意抽出四张（数字表示为1－13），用加、减、乘、除的方法使结果成为24，每张牌只能用一次。一副牌（52张）中，任意抽取4张可有1820种不同组合，其中有458个牌组算不出24点。10，10，9，6是其中之一。

2进制的10是十进制的2，将一个10看作2
1: (10 - 2) × (9 - 6)
2: (2 - 10) × (6 - 9)
3: (9 - 10 ÷ 2) × 6
4: (9 - (10 ÷ 2)) × 6
5: (9 - 6) × (10 - 2)
6: 6 × (9 - 10 ÷ 2)
7: 6 × (9 - (10 ÷ 2)
8: (6 - 9) × (2 - 10)
将两个10看作2
1: 2 × (2 × 9 - 6)
2: 2 × ((2 × 9) - 6)
3: 2 × (9 × 2 - 6)
4: 2 × ((9 × 2) - 6)
5: 2 × (9 + 6 ÷ 2)
6: 2 × (9 + (6 ÷ 2))
7: (2 × 9 - 6) × 2
8: ((2 × 9) - 6) × 2
9: 2 × (6 ÷ 2 + 9)
10: 2 × ((6 ÷ 2) + 9)
11: (9 × 2 - 6) × 2
12: ((9 × 2) - 6) × 2
13: (9 + 6 ÷ 2) × 2
14: (9 + (6 ÷ 2)) × 2
15: (6 ÷ 2 + 9) × 2
16: ((6 ÷ 2) + 9) × 2

3。根号9＝3
1: (10 ÷ 10 + 3) × 6
2: ((10 ÷ 10) + 3) × 6
3: 10 × (3 - 6 ÷ 10)
4: 10 × (3 - (6 ÷ 10))
5: (3 + 10 ÷ 10) × 6
6: (3 + (10 ÷ 10)) × 6
7: