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