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Factors Factor ladders JMG

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**Take the smallest prime you can**

These are the prime numbers Take the smallest prime you can 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, ……….. Find the prime factors of 24 2 24 2 12 2 6 3 3 1 24 = 2 X 2 X 2 X3 JMG

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**Take the smallest prime you can**

These are the prime numbers Take the smallest prime you can 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, ……….. Find the prime factors of 24 and 36 2 24 2 36 2 12 2 18 2 6 3 9 3 3 3 3 1 1 24 = 2 X 2 X 2 X3 36= 2 X X 3 X 3 JMG

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**Take any column that has two numbers**

24 = 2 X 2 X 2 X 3 Take any column that has two numbers 36 = 2 X X 3 X 3 HCF = 2 X X 3 HCF = 12 JMG

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**Put an arrow on every column**

24 = 2 X 2 X 2 X 3 Put an arrow on every column 36 = 2 X X 3 X 3 LCM = 2 X 2 X 2 X 3 X 3 LCM = 72 JMG

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