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Saturday, 09 September 2006 ©RSH Number Factors and Multiples

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Saturday, 09 September 2006 ©RSH Factors Any number which divides exactly into 6 is a factor of 6 The factors of 6 are: 1, 2, 3, 6 Factors Any number which divides exactly into 6 is a factor of 6 The factors of 6 are: 1, 2, 3, 6 Multiples Any number in the 6-times table is a multiple of 6 The first 4 multiples of 6 are: 6, 12, 18, 24 Multiples Any number in the 6-times table is a multiple of 6 The first 4 multiples of 6 are: 6, 12, 18, 24 Notes

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Saturday, 09 September 2006 ©RSH Exercise 1.Write down the factors of 2.Write down the first 4 multiples of a)8 b)15 c)18 d)21 e)40 a)8 b)5 a)1, 8, 2, 4 b)1, 15, 3, 5 c)1, 18, 2, 9, 3, 6 d)1, 21, 3, 7 e)1, 40, 2, 20, 4, 10, 5, 8 a)8, 16, 24, 32 b)5, 10, 15, 20

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Saturday, 09 September 2006 ©RSH LCM (Lowest Common Multiple) The first few multiples of 4 are: 4, 8, 12, 16, 20, 24, 28, … The first few multiples of 5 are: 5, 10, 15, 20, 25, 30, … LCM (Lowest Common Multiple) The first few multiples of 4 are: 4, 8, 12, 16, 20, 24, 28, … The first few multiples of 5 are: 5, 10, 15, 20, 25, 30, … Notes The LCM of 4 and 5 is the smallest number in both lists. The LCM of 4 and 5 is 20. The LCM of 4 and 5 is the smallest number in both lists. The LCM of 4 and 5 is 20. The LCM is the smallest number that both 4 and 5 divide into.

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Saturday, 09 September 2006 ©RSH Exercise 1.Find the LCM of a)2 and 5 b)4 and 12 c)6 and 9 d)4 and 6 e)8 and 12 a)10 b)12 c)18 d)12 e)24

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Saturday, 09 September 2006 ©RSH HCF (Highest Common Factor) The factors of 12 are: 1, 2, 3, 4, 6, 12 The factors of 20 are: 1, 2, 4, 5, 10, 20 HCF (Highest Common Factor) The factors of 12 are: 1, 2, 3, 4, 6, 12 The factors of 20 are: 1, 2, 4, 5, 10, 20 Notes The HCF of 12 and 20 is the highest number in both lists. The HCF of 12 and 20 is 4. The HCF of 12 and 20 is the highest number in both lists. The HCF of 12 and 20 is 4. The HCF is the highest factor of both 12 and 20.

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Saturday, 09 September 2006 ©RSH Exercise 1.Find the HCF of a)12 and 18 b)22 and 33 c)6 and 9 d)24 and 36 e)18 and 30 a)6 b)11 c)3 d)12 e)6

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