Least Common Multiple | MathHelp.com - By MathHelp.com
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| 00:0-1 | to find the least common multiple for the integers . | |
| 00:03 | 30 and 42 . We start by making a factor | |
| 00:08 | tree for each of our imagers . So 30 is | |
| 00:15 | 10 times three and 10 Is five times 2 . | |
| 00:23 | 42 is seven times 6 and six is 3 times | |
| 00:31 | two Notice that our 2s match up has factors of | |
| 00:39 | each of our imagers . And our three's also match | |
| 00:44 | up as factors of each of our integers when finding | |
| 00:50 | the least common multiple . We simply multiply all of | |
| 00:54 | our factors together . But since the twos match up | |
| 01:00 | and the threes matchup , We only multiply by a | |
| 01:04 | two and a three once . So at least common | |
| 01:09 | multiple or L . C . M . Is two | |
| 01:18 | times three Times The five that doesn't match up Times | |
| 01:29 | The seven that doesn't match up . So we have | |
| 01:35 | two times three which is six Times five which is | |
| 01:41 | 30 Times seven which is 210 . So the least | |
| 01:47 | common multiple for 30 and 42 Is 210 . |
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