1. GREATEST COMMON FACTOR

2. The greatest common factor (GCF) of 2 or more numbers is
the largest number that can divide into all of the numbers. Find the GCF of 42 and 60. Write the prime factorization of each number.

3. Find the GCF of 42 and 60.   1
What prime factors do the numbers have in common? Multiply those numbers with the lowest exponents . The GCF is 2 x 3 = 6 6 is the largest number that can go into 42 and 60!

4. Greatest Common Factor
Find the GCF of
12 and 18
18 and 27
24 and 30
36 and 45
24 and 36
16, 32 and 40
18,27 and 36

5. Find the HCF of :
2x3x5 and 2x3x7
2x3x5x7 and 2x2x3x11
3) 2x2x3x5 and 2x2x3x11
4) 2x2x2x5x7 and 2x2x2x5x11
5) 2x2x2x7x7 and 2x2x2x7x11

6. LEAST COMON MULTIPLE

7. The least common multiple of 2 or more numbers is
the smallest number that is common between two lists of multiples.

8. Write the common and non common factors with the greatest exponents
Find the LCM of 42 and 60.   1
Write the common and non common factors with the greatest exponents
The LCM of 42 and 60 is 420.

9. Least Common Multiple
Find the LCM of the following
30 and 25
32 and 8
12, 32 and 4
4. 3 and 9
5. 2,4 and 6

10. 1. 2x5 and 5x5 2. 2x2x3 and 2x2x5 3. 2x2x3 and 2x7 4.2x2x2 and 2x7
Find the LCM of
1. 2x5 and 5x5
2. 2x2x3 and 2x2x5
3. 2x2x3 and 2x7
4.2x2x2 and 2x7
5. 2x2x5 and 5x5