LCM( 39, 78 ) = 78
Step 1 : Place the numbers inside division bar:
39 | 78 |
Step 2 : Find a prime number which divides both numbers.
In this example we can divide by 3. If any number is not divisible by 3 write it down unchanged.
3 | 39 | 78 |
13 | 26 |
Step 3 : Repeat Step 2 until you can no longer divide.
3 | 39 | 78 |
13 | 13 | 26 |
1 | 2 |
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 = 39 · 78 = 78
This solution can be visualized using a Venn diagram.
The LCM is equal to the product of all the numbers on the diagram.