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Factors Multiples and products of Primes

Factors Multiples and products of Primes. You tube support. For Playlist click here. Factors and HCF. ANSWERS 1,2,4,5,10,20 1,2,3,4,6,8,12,24 1,3,9,27 1,2,4,8,16,32 1,2,4,5,8,10,20,40 1,2,5,10,25,50 1,2,4,6,7,8,14,28,56 1,2,3,4,5,6,10,12,20,24,30,40,60,120 1,2,4,5,10,20,40,50,100,200

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Factors Multiples and products of Primes

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  1. Factors Multiples and products of Primes

  2. You tube support • For Playlist click here

  3. Factors and HCF ANSWERS • 1,2,4,5,10,20 • 1,2,3,4,6,8,12,24 • 1,3,9,27 • 1,2,4,8,16,32 • 1,2,4,5,8,10,20,40 • 1,2,5,10,25,50 • 1,2,4,6,7,8,14,28,56 • 1,2,3,4,5,6,10,12,20,24,30,40,60,120 • 1,2,4,5,10,20,40,50,100,200 • 2,3,5,7,11,13,17,19,23,29 (10 of them) • 18 • 5 • 6 • 27 • 15 • 90 • 96 • 39 • Find all the factors of the following numbers: • 20 • 24 • 27 • 32 • 40 • 50 • 56 • 120 • 200 • 2 only has 2 factors (1 and 2), how many numbers can you find between 1 and 30 which have exactly 2 factors? (these are called prime numbers) • Find the highest common factors of the following pairs of numbers: • 18 and 54 • 25 and 45 • 12 and 18 • 27 and 108 • 30 and 75 • Find the HCF of these pairs of numbers: • 90 and 450 • 96 and 480 • 39 and 195 Home

  4. Factor Trees Answers • 22x5 • 3 x 23 • 3 x 24 • 2 x 32 x 5 • 34 • 2 x 52 • 3 x 52 • 23 x 3 x 5 • 23 x 52 • 23 x 32 x 52 • Draw factor trees for the following numbers: • 20 • 24 • 48 • 90 • 81 • 50 • 75 • 120 • 200 • 1800 2. Using your factor trees from question 1, write the numbers as products of their prime factors . Home

  5. HCF and LCM Find the Lowest Common Multiple of these numbers • 6 and 7 • 4 and 6 • 5 and 8 • 10 and 4 • 16 and 5 • 14 and 21 • 2.2 and 5 • 0.4 and 7 Find the Highest Common Factor of these numbers: • 18 and 30 • 15 and 20 • 16 and 24 • 12 and 36 • 20 and 30 • 28 and 70 • 39 and 65 • 38 and 57 • 6 • 5 • 8 • 12 • 10 • 14 • 13 • 19 • 42 • 12 • 40 • 20 • 80 • 42 • 55 • 14 Home

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