LCM( 10, 3, 15, 2 ) = 30
Step 1 : Place the numbers inside division bar:
10 | 3 | 15 | 2 |
Step 2 : Find a prime number which can divide at least two of your numbers.
In this example we can divide by 2. If any number is not divisible by 2 write it down unchanged.
2 | 10 | 3 | 15 | 2 |
5 | 3 | 15 | 1 |
Step 3 : Repeat Step 2 until you can no longer divide.
2 | 10 | 3 | 15 | 2 |
5 | 5 | 3 | 15 | 1 |
1 | 3 | 3 | 1 |
2 | 10 | 3 | 15 | 2 |
5 | 5 | 3 | 15 | 1 |
3 | 1 | 3 | 3 | 1 |
1 | 1 | 1 | 1 |
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 = 10 · 3 · 15 · 2 = 30