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© T Madas

… is a factor of … … is a factor of … 2 3 5 18 20 21 4 7 9 27 28 35 6 7 24 30 42 3 8 9 32 36 40 © T Madas

… is a factor of … … is a factor of … 4 6 8 36 40 42 4 7 9 48 54 56 63 3 4 6 51 64 72 © T Madas

… is a factor of … … is a factor of … 3 4 9 75 84 99 6 8 12 60 80 90 13 14 42 48 52 12 14 15 45 56 72 © T Madas

… is a factor of … … is a factor of … 13 14 16 39 48 56 13 16 18 54 65 80 … is a factor of … … is a factor of … 12 13 18 78 84 90 14 17 19 51 57 84 © T Madas

© T Madas