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Question
Find the LCM:
63, 81
Solution
| 3 | 63 |
| 3 | 21 |
| 7 | 7 |
| 1 |
| 3 | 81 |
| 3 | 27 |
| 3 | 9 |
| 3 | 3 |
| 1 |
63 = 3 × 3 × 7
81 = 3 × 3 × 3 × 3
∴ LCM = 3 × 3 × 7 × 3 × 3
= 63 × 9
= 567
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