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Question
Find the smallest number that is completely divisible by 28 and 42.
Solution
We know that the least number which is divisible by 28 and 42 is their L.C.M.
| 2 | 28, | 42 |
| 7 | 14, | 21 |
| 2, | 3 |
L.C.M. of 28 and 42 = 2 × 2 × 3 × 7 = 84
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