LCM( 8, 9, 4, 3 ) = 72
Step 1 : Place the numbers inside division bar:
8 | 9 | 4 | 3 |
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 | 8 | 9 | 4 | 3 |
4 | 9 | 2 | 3 |
Step 3 : Repeat Step 2 until you can no longer divide.
2 | 8 | 9 | 4 | 3 |
2 | 4 | 9 | 2 | 3 |
2 | 9 | 1 | 3 |
2 | 8 | 9 | 4 | 3 |
2 | 4 | 9 | 2 | 3 |
3 | 2 | 9 | 1 | 3 |
2 | 3 | 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 = 8 · 9 · 4 · 3 = 72