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Learning Hub/Primary 4/Factors and Multiples

Primary 4 Factors and Multiples

Keywords

Factor
A whole number that divides another exactly.
Factor pair
Two numbers whose product is the given number.
Common factor
A factor of both numbers.
Multiple
A product found by multiplying a number by 1, 2, 3 and so on.
Common multiple
A number in the multiples lists for both numbers.

Factors and common factors

A factor divides a number exactly, with no remainder. Find factors in pairs so none are missed. A common factor divides both numbers exactly.

Find the common factors of 12 and 18.

Step 0 of 3

Start with the first number. Show the first step.

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Find the common factors of 12 and 18.

  1. List the factor pairs of 12: 1 × 12, 2 × 6 and 3 × 4. Its factors are 1, 2, 3, 4, 6 and 12.
  2. List the factor pairs of 18: 1 × 18, 2 × 9 and 3 × 6. Its factors are 1, 2, 3, 6, 9 and 18.
  3. Compare the lists. The numbers in both are 1, 2, 3 and 6.

Answer: The common factors of 12 and 18 are 1, 2, 3 and 6.

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Find the common factors of 8 and 12.

Reveal the answer

Factors of 8: 1, 2, 4, 8. Factors of 12: 1, 2, 3, 4, 6, 12. Common factors: 1, 2 and 4.

Multiples and common multiples

A multiple is the result of multiplying a number by 1, 2, 3 and so on. The list never ends. A common multiple appears in the lists for both numbers.

Find first 2 common multiples of 4 and 6.

Step 0 of 3

Start with the first number. Show the first step.

See the full working

Find first 2 common multiples of 4 and 6.

  1. Count in 4s or multiply 4 by 1, 2, 3, 4, 5 and 6: 4, 8, 12, 16, 20, 24.
  2. Count in 6s or multiply 6 by 1, 2, 3, 4, 5 and 6: 6, 12, 18, 24, 30, 36.
  3. Compare the lists in order. 12 is the first number in both, and 24 is the second. So the first two common multiples are 12 and 24.

Answer: The first two common multiples of 4 and 6 are 12 and 24.

Try together

Find the first two common multiples of 3 and 5.

Reveal the answer

Multiples of 3 include 3, 6, 9, 12, 15 and 30. Multiples of 5 include 5, 10, 15, 20, 25 and 30. The first two common multiples are 15 and 30.

Factors of ________

Factors of ________

Factors of ________

Factors of ________

2 to 9 times tables

2 times table

  1. 2 × 1 = 2
  2. 2 × 2 = 4
  3. 2 × 3 = 6
  4. 2 × 4 = 8
  5. 2 × 5 = 10
  6. 2 × 6 = 12
  7. 2 × 7 = 14
  8. 2 × 8 = 16
  9. 2 × 9 = 18
  10. 2 × 10 = 20
  11. 2 × 11 = 22
  12. 2 × 12 = 24

3 times table

  1. 3 × 1 = 3
  2. 3 × 2 = 6
  3. 3 × 3 = 9
  4. 3 × 4 = 12
  5. 3 × 5 = 15
  6. 3 × 6 = 18
  7. 3 × 7 = 21
  8. 3 × 8 = 24
  9. 3 × 9 = 27
  10. 3 × 10 = 30
  11. 3 × 11 = 33
  12. 3 × 12 = 36

4 times table

  1. 4 × 1 = 4
  2. 4 × 2 = 8
  3. 4 × 3 = 12
  4. 4 × 4 = 16
  5. 4 × 5 = 20
  6. 4 × 6 = 24
  7. 4 × 7 = 28
  8. 4 × 8 = 32
  9. 4 × 9 = 36
  10. 4 × 10 = 40
  11. 4 × 11 = 44
  12. 4 × 12 = 48

5 times table

  1. 5 × 1 = 5
  2. 5 × 2 = 10
  3. 5 × 3 = 15
  4. 5 × 4 = 20
  5. 5 × 5 = 25
  6. 5 × 6 = 30
  7. 5 × 7 = 35
  8. 5 × 8 = 40
  9. 5 × 9 = 45
  10. 5 × 10 = 50
  11. 5 × 11 = 55
  12. 5 × 12 = 60

6 times table

  1. 6 × 1 = 6
  2. 6 × 2 = 12
  3. 6 × 3 = 18
  4. 6 × 4 = 24
  5. 6 × 5 = 30
  6. 6 × 6 = 36
  7. 6 × 7 = 42
  8. 6 × 8 = 48
  9. 6 × 9 = 54
  10. 6 × 10 = 60
  11. 6 × 11 = 66
  12. 6 × 12 = 72

7 times table

  1. 7 × 1 = 7
  2. 7 × 2 = 14
  3. 7 × 3 = 21
  4. 7 × 4 = 28
  5. 7 × 5 = 35
  6. 7 × 6 = 42
  7. 7 × 7 = 49
  8. 7 × 8 = 56
  9. 7 × 9 = 63
  10. 7 × 10 = 70
  11. 7 × 11 = 77
  12. 7 × 12 = 84

8 times table

  1. 8 × 1 = 8
  2. 8 × 2 = 16
  3. 8 × 3 = 24
  4. 8 × 4 = 32
  5. 8 × 5 = 40
  6. 8 × 6 = 48
  7. 8 × 7 = 56
  8. 8 × 8 = 64
  9. 8 × 9 = 72
  10. 8 × 10 = 80
  11. 8 × 11 = 88
  12. 8 × 12 = 96

9 times table

  1. 9 × 1 = 9
  2. 9 × 2 = 18
  3. 9 × 3 = 27
  4. 9 × 4 = 36
  5. 9 × 5 = 45
  6. 9 × 6 = 54
  7. 9 × 7 = 63
  8. 9 × 8 = 72
  9. 9 × 9 = 81
  10. 9 × 10 = 90
  11. 9 × 11 = 99
  12. 9 × 12 = 108
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