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Question
Find the LCM:
12, 15, 45
Solution
| 2 | 12 |
| 2 | 6 |
| 3 | 3 |
| 1 |
| 3 | 15 |
| 5 | 5 |
| 1 |
| 3 | 45 |
| 3 | 15 |
| 5 | 5 |
| 1 |
12 = 2 × 2 × 3
15 = 3 × 5
45 = 3 × 3 × 5
∴ LCM = 3 × 5 × 2 × 2 × 3
= 180
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