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.

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!

42 2 60 2433 30 2 7 7  15 3

1 5 5 1

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

Find the HCF of :

1) 2x3x5 and 2x3x7 2) 2x3x5x7 and 2x2x3x11 3) 2x2x3x5 and 2x2x3x11 4) 2x2x2x5x7 and 2x2x2x5x115) 2x2x2x7x7 and 2x2x2x7x11

the smallest number that is common between two lists of multiples.

Write the common and non common factors with the greatest exponents

The LCM of 42 and 60 is 420.

4242 2 60 22 60 243433 30 23 30 2 7 77 7   15 3 15 3

1 5 51 5 5 1 1

Find the LCM of the following

1.30 and 252. 32 and 83. 12, 32 and 44. 3 and 95. 2,4 and 6

1. 2x5 and 5x52. 2x2x3 and 2x2x5 3. 2x2x3 and 2x74.2x2x2 and 2x7 5. 2x2x5 and 5x5