LCM( 7, 9, 10 ) = 630
Step 1 : Place the numbers inside division bar:
7 | 9 | 10 |
Step 2 : Find a prime number which can divide at least two of your numbers.
Since there are no primes that divides at least two of given numbers, we conclude that the LCM is a product of starting numbers.
LCM = 7 · 9 · 10 = 630
This solution can be visualized using a Venn diagram.
The LCM is equal to the product of all the numbers on the diagram.