1. GCF (greatest common factor) & LCM (least common multiple) Click on the link below to access videos:

2. FACTOR
A whole number that divides another whole number with a remainder of 0.
EXAMPLE
Find the factors of 30.

3. MULTIPLE The product of that number and any nonzero whole number.
example
Find the multiples of 5.
Find the multiples of 8.

4. GREATEST COMMON FACTOR (GCF)
The greatest number that is a factor of all the numbers.

5. Find the LCM of each pair of numbers.
LEAST COMMON MULTIPLE
The least multiple that is common to all of the numbers.
example
Find the LCM of each pair of numbers.
4, 10
12, 15

6. Find the GCF and LCM of 42 and 36.

7. Find the GCF and LCM of 24 and 36.

8. Find the GCF and LCM of 142 and 136.

9. Find the GCF and LCM of 142 and 136.

10. Find the GCF and LCM of 240, 36 and 144.

11. Find the GCF and LCM of 240, 36 and 144.

12. Find the GCF and LCM of 6, 30, 40

13. Find the GCF and LCM of 4, 15, 40