LCM( 8, 5, 4, 10 ) = 40
Step 1 : Place the numbers inside division bar:
8 | 5 | 4 | 10 |
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 | 5 | 4 | 10 |
4 | 5 | 2 | 5 |
Step 3 : Repeat Step 2 until you can no longer divide.
2 | 8 | 5 | 4 | 10 |
2 | 4 | 5 | 2 | 5 |
2 | 5 | 1 | 5 |
2 | 8 | 5 | 4 | 10 |
2 | 4 | 5 | 2 | 5 |
5 | 2 | 5 | 1 | 5 |
2 | 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 = 8 · 5 · 4 · 10 = 40