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make a t chart to find all factors of a number.
Find all factors of 48.
1 is a factor of every # --- 1 x itself... 1 x 48. Always start with 1 x the number. Move to the next # which is 2. Apply the rules of divisibility : every even # is divisible by 2... 2 x 24 Move to the next # which is 3. Use rule of divisibility for 3... 3 x 16 = 48 Using divisibility rules will show that 4 and 6 are factors of 48... 4 x 12 and 6 x 8 Notice: 5 and 9 are not factors of 48. Applying the divisibility rules to 48 will show it does not divide evenly by 5 or 9. Testing the number for divisibility by 1, 2, 3, 4, 5, 6, 9, 10 will make a list of factor pairs for that number. |
48
All Factors of 48
1,2,3,4,6,8,12,16,24,48 |
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More Rules
7 11 15 25 |
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18
Factor pairs of 18 1 x 18 2 x 9 3 x 6 All factors of 18: 1, 2, 3, 6, 9, 18 30 Factor pairs of 30 1 x 30 2 x 15 3 x 10 5 x 6 All factors of 30: 1, 2, 3, 5, 6, 10, 15, 30 |
24
Factor pairs of 24 1 x 24 2 x 12 3 x 8 4 x 6 All factors of 24: 1, 2, 3, 4, 6, 8, 12, 24 132
Factor pairs of 132 1 x 132 2 x 66 3 x 44 4 x 33 6 x 22 11 x 12 All factors of 132: 1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 132 |