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