Course 1 2.2/2.3- GCF& LCM

relatively prime numbers

2 or more numbers that do not have any common factors other than 1

Write the prime factorization for 48

2 x 2 x 2 x 2 x 3

Write the prime factorization of 72

2 x 2 x 2 x 3 x 3

Write the prime factorization of 28

2 x 2 x 7

An example of 2 relatively prime numbers

5 and 11

An example of 2 relatively prime numbers

5 and 7

What s the GCF for 6 and 28?

GCF = 2

What is the GCF for 20 and 100?

GCF = 20

What is the greatest common factor for 20 and 50?

GCF = 5

What is the greatest common factor for 24 and 40?

GCF= 8

What is the LCM for 12 and 40

LCM = 120

What is the LCM for 8 and 16?

LCM = 16

What is the LCM for 4 and 18?

LCM = 36

What is the least common multiple for 10 and 12?

LCM = 60

common factor

a factor 2 or more numbers have in common

prime factorization

a long string of factors made up of prime numbers

greatest common factor

the largest factor 2 or more numbers have in common

least common multiple

the smallest multiple 2 or more numbers have in common