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1. The L.C.M. of 22, 54, 108, 135 and 198 is = ?
L.C.M. = 2 × 3 × 3 × 3 × 11 × 2 × 5
= 5940
Solution:
| 2 | 22 | - | 54 | - | 108 | - | 135 | - | 198 |
| 3 | 11 | - | 27 | - | 54 | - | 135 | - | 99 |
| 3 | 11 | - | 9 | - | 18 | - | 45 | - | 33 |
| 3 | 11 | - | 3 | - | 6 | - | 15 | - | 11 |
| 11 | 11 | - | 1 | - | 2 | - | 5 | - | 11 |
| 1 | - | 1 | - | 2 | - | 5 | - | 1 |
L.C.M. = 2 × 3 × 3 × 3 × 11 × 2 × 5
= 5940