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**GREATEST COMMON FACTOR**

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**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.

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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!

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**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

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

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LEAST COMON MULTIPLE

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**The least common multiple of 2 or more numbers is**

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

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**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.

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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

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**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

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