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Question
Find the LCM:
10, 15, 20
Sum
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Solution
| 2 | 10 |
| 5 | 5 |
| 1 |
| 3 | 15 |
| 5 | 5 |
| 1 |
| 2 | 20 |
| 2 | 10 |
| 5 | 5 |
| 1 |
10 = 2 × 5
15 = 3 × 5
20 = 2 × 2 × 5
∴ LCM = 5 × 2 × 3 × 2
= 60
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