24点题目：使用数字 4 5 10 12，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34个解（使用交换律变换后算一个解）,
难度系数是3星
★★★☆☆☆☆☆【
中等偏易24点题目
】。
| 序号 |
题目：4,5,10,12 |
| 1 |
((12 × 5) × 4) ÷ 10 |
| 2 |
((12 × 5) ÷ 10) × 4 |
| 3 |
((12 × 4) × 5) ÷ 10 |
| 4 |
((5 × 4) × 12) ÷ 10 |
| 5 |
(12 × 4) ÷ (10 ÷ 5) |
| 6 |
(12 ÷ (10 ÷ 5)) × 4 |
| 7 |
12 × ((5 × 4) ÷ 10) |
| 8 |
12 × (4 ÷ (10 ÷ 5)) |
| 9 |
12 × (4 − (10 ÷ 5)) |
| 10 |
(12 × 5) × (4 ÷ 10) |
| 11 |
(12 × 5) ÷ (10 ÷ 4) |
| 12 |
(5 × 4) ÷ (10 ÷ 12) |
| 13 |
(12 × (5 ÷ 10)) × 4 |
| 14 |
(5 × 4) × (12 ÷ 10) |
| 15 |
(5 ÷ (10 ÷ 12)) × 4 |
| 16 |
(12 × 4) × (5 ÷ 10) |
| 17 |
(5 × (12 ÷ 10)) × 4 |
| 18 |
5 ÷ (10 ÷ (12 × 4)) |
| 19 |
12 × (5 ÷ (10 ÷ 4)) |
| 20 |
4 ÷ ((10 ÷ 5) ÷ 12) |
| 21 |
5 ÷ ((10 ÷ 12) ÷ 4) |
| 22 |
12 × (5 × (4 ÷ 10)) |
| 23 |
12 ÷ ((10 ÷ 5) ÷ 4) |
| 24 |
5 ÷ ((10 ÷ 4) ÷ 12) |
| 25 |
12 ÷ ((10 ÷ 4) ÷ 5) |
| 26 |
4 ÷ ((10 ÷ 12) ÷ 5) |
| 27 |
5 × (12 × (4 ÷ 10)) |
| 28 |
5 × (4 ÷ (10 ÷ 12)) |
| 29 |
12 × (4 × (5 ÷ 10)) |
| 30 |
4 ÷ (10 ÷ (12 × 5)) |
| 31 |
5 × ((12 × 4) ÷ 10) |
| 32 |
5 × (4 × (12 ÷ 10)) |
| 33 |
12 ÷ (10 ÷ (5 × 4)) |
| 34 |
5 × (12 ÷ (10 ÷ 4)) |