3 Decide if each of these sentences is true or false. (a) The number 56 is a multiple of 6. (b) The number 4 is a factor of 30 and 40. (c) The number 81 is a multiple of 3 and 9.
List the factors of 24 and 16. (a) Circle the common factors in each list. (b) Which is the Highest Common Factor?
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List the first ten multiples of 5 and 8. Circle the lowest common multiple.
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5 Winston has written the first 8 multiples of 3 and 4 3: 3, 6, 9, 12, 15, 18, 21, 24 4: 4, 8, 12, 16, 20, 24, 28 He notices that 12 and 24 are both common factors. What will be the next common factor after 24?
6 Explain how you know that 25 is a factor of 1775. Write down three more 4-digit numbers that are multiples of 25.
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