The smallest number that is divisible by each one of 9,12,15 is the LCM of 9, 12 and 15.
By division method,
| 2 | 9 | 12 | 15 |
| 2 | 9 | 6 | 15 |
| 3 | 3 | 3 | 15 |
| 3 | 3 | 1 | 5 |
| 5 | 1 | 1 | 5 |
| 1 | 1 | 1 |
LCM (9, 12, 15) = 2 x 2 x 3 x 3 x 5 = 180
The smallest number that is divisible by each one of 9,12,15 is the LCM of 9, 12 and 15.
By division method,
| 2 | 9 | 12 | 15 |
| 2 | 9 | 6 | 15 |
| 3 | 3 | 3 | 15 |
| 3 | 3 | 1 | 5 |
| 5 | 1 | 1 | 5 |
| 1 | 1 | 1 |
LCM (9, 12, 15) = 2 x 2 x 3 x 3 x 5 = 180
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