How do I find the Greatest Common Factor (GCF)?
The greatest common factor is simply the greatest factor that divides two number evenly.
Example:
Let us have two numbers 12 and 18
List the prime factors of 12:
2, 2, 3
List the prime factors of 18:
2, 3, 3
Now multiply those factors which are common in both numbers.
As you can see 2 and 3 are common in both.
2×3 = 6
Therefore, the Greatest Common Factor of 12 and 18 is 6.
How do I find the Least Common Multiple (LCM)?
