24点题目：使用数字 1 2 2 6，利用加减乘除、括号算出24。数字顺序可以任意调换，下面列出所有可行算式。
本题共有39个解（使用交换律变换后算一个解）,
难度系数是3星
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中等偏易24点题目
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| 序号 |
题目：1,2,2,6 |
| 1 |
((6 × 2) × 1) × 2 |
| 2 |
((6 × 1) × 2) × 2 |
| 3 |
((6 × 2) × 2) × 1 |
| 4 |
(6 × (2 + 2)) × 1 |
| 5 |
(6 × 1) × (2 + 2) |
| 6 |
(6 × (2 × 1)) × 2 |
| 7 |
(6 × 2) × (2 × 1) |
| 8 |
(6 × (2 × 2)) × 1 |
| 9 |
(6 + 2) × (2 + 1) |
| 10 |
(6 × 1) × (2 × 2) |
| 11 |
6 × ((2 + 2) × 1) |
| 12 |
6 × (2 × (2 × 1)) |
| 13 |
6 × ((2 × 2) × 1) |
| 14 |
6 × (2 + (2 × 1)) |
| 15 |
((6 × 2) ÷ 1) × 2 |
| 16 |
((6 × 2) × 2) ÷ 1 |
| 17 |
((6 ÷ 1) × 2) × 2 |
| 18 |
(6 × (2 + 2)) ÷ 1 |
| 19 |
(6 × (2 × 2)) ÷ 1 |
| 20 |
(6 × 2) × (2 ÷ 1) |
| 21 |
(6 ÷ 1) × (2 × 2) |
| 22 |
(6 × (2 ÷ 1)) × 2 |
| 23 |
(6 ÷ 1) × (2 + 2) |
| 24 |
6 × (2 + (2 ÷ 1)) |
| 25 |
6 × ((2 + 2) ÷ 1) |
| 26 |
6 × (2 × (2 ÷ 1)) |
| 27 |
6 × ((2 × 2) ÷ 1) |
| 28 |
(2 ÷ (1 ÷ 6)) × 2 |
| 29 |
(6 × 2) ÷ (1 ÷ 2) |
| 30 |
(6 ÷ (1 ÷ 2)) × 2 |
| 31 |
(2 × 2) ÷ (1 ÷ 6) |
| 32 |
(2 + 2) ÷ (1 ÷ 6) |
| 33 |
2 ÷ ((1 ÷ 6) ÷ 2) |
| 34 |
6 ÷ ((1 ÷ 2) ÷ 2) |
| 35 |
6 × (2 ÷ (1 ÷ 2)) |
| 36 |
2 ÷ ((1 ÷ 2) ÷ 6) |
| 37 |
6 ÷ (1 ÷ (2 + 2)) |
| 38 |
2 ÷ (1 ÷ (6 × 2)) |
| 39 |
6 ÷ (1 ÷ (2 × 2)) |