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Question
Using the common multiple method, find the L.C.M. of the following:
10, 15 and 20
Solution
10, 15 and 20
| 2 | 10, | 15 | 20 |
| 2 | 5, | 15 | 10 |
| 5 | 5, | 15, | 5 |
| 1, | 3, | 1 |
∴ L.C.M. = 2 x 2 x 5 x 3 = 60
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