Worksheet on Multiples and Factors

1. List the first five multiples of the following numbers:

(i) 5 

(ii) 10

(iii) 7

(iv) 11

(v) 14

(vi) 20

(vii) 21

(viii) 13

(ix) 15

(x) 17

Answer:

(i) 5, 10, 15, 20, 25

(ii) 10, 20, 30, 40, 50

(iii) 7, 14, 21, 28, 35

(iv) 11, 22, 33, 44, 55

(v) 14, 28, 42, 56, 70

(vi) 20, 40, 60, 80, 100

(vii) 21, 42, 63, 84, 105

(viii) 13, 26, 39, 52, 65

(ix) 15, 30, 45, 60, 75

(x) 17, 34, 51, 68, 85


2. Choose the numbers that are factors of 24

5          6          2          7          8          12        4          3          14        19        24

Answer:       

6, 2, 8, 12, 4, 3, 24


3. Choose the numbers that are multiples of 15

30        45        84        75        36        65        105      150      165      180      120      130

Answer:    

30, 45, 75, 105, 150, 165, 180, 120


4. Choose the numbers which are multiple of 3 as well as factor of 36

15        13        6          10        4          21        12        9

Answer:    

6, 12, 9


5. Write the multiples of 8 between 65 and 75

Answer:    

64, 72


6. Write the factors of 32 between 5 to 25

Answer:    

8, 16


7. List all the factors of:

(i) 12

(ii) 15

(iii) 25

(iv) 126

(v) 81

(vi) 56

(vii) 64

(viii) 96

(ix) 84

(x) 50


Answer:    

(i) 1, 2, 3, 4, 6, 12

(ii) 1, 3, 5, 15

(iii) 1, 5, 25

(iv) 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126

(v) 1, 3, 9, 27, 81

(vi) 1, 2, 4, 7, 8, 14, 28, 56

(vii) 1, 2, 4, 8, 16, 32, 64

(viii) 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 96

(ix) 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84

(x) 1, 2, 5, 10, 25, 50


8. Write the sixth, eighth and tenth multiple of 9

Answer:    

The sixth, eighth and tenth multiple of 9 are: 54, 72, 90


9. Write the five multiples and first two common multiples of the pair of numbers:

(i) 12

   16

(ii) 20

    25

(iii) 6

     8

(iv) 4

     2

(v) 18

     9


Answer:    

(i) Multiples of 12: 12, 24, 36, 48, 60

Multiples of 16: 16, 32, 48, 64

Common multiple 12 & 16: 48 and 96


(ii) Multiples of 20: 20, 40, 60, 80, 100

 Multiples of 25: 25, 50, 75, 100, 125

Common multiple of 20 & 25: 100 and 200


(iii)  Multiples of 6: 6, 12, 18, 24, 30

      Multiples of 8: 8, 16, 24, 32, 40

Common multiples of 6 & 8: 24 and 48


(iv) Multiples of 4: 4, 8, 12, 16, and 20

     Multiples of 2: 2, 4, 6, 8, 10

Common multiples of 4 & 2 = 4 and 8


(v) Multiples of 18: 18, 36, 54, 72, 90

     Multiples of 9: 9, 18, 27, 36, 45

Common multiples of 18 and 9: 18 and 36

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