Question

PLAYING WITH NUMBERS
I Write all the factors of the following numbers:
Example (1): Write all the factors of 68.
68 = 1 x 68
68 = 2 x 34
68 = 4 x 17
68 = 17 x4
68 = 34 x 2
68 = 68 x 1
Factors of the 68 are 1.2.4.17,34,68
e) 36
a) 24
b) 15 c) 21 d) 20
II Write first five multiples of:
Example (2): Write first five multiples of 13
13 x 1 = 13
13 x 2 = 26
13 x 3 =39
13 x 4 =52
13 x 5 = 65
So first five multiples of 13 is 13,26,39,52and 65.
b) 12
a) 8
d) 9
c) 10
e) 15​

Answer 1

factor of 68 24 is the answer

13 multiple is 5

12

Answer 2

e.36 =1×36

36=2×18

36=3×12

36=4×9

36=6×6

Factors of 36 are 1,2,3,4,6,9,12,18 ,36

a. 24=1×24

24=2×12

24=3×8

24=4×6

Factors of 24 are 1,2,3,4,6,8,12,24

b.15=1×15

15=3×5

Factors of 15 are 1,3,5,15

c.21=1×21

21=3×7

Factors of 21 are 1,3,7,21

d.20=1×20

20=2×10

20=4×5

Factors of 20 are 1,2,4,5,10,20

II)

b.12×1=12

12×2=24

12×3=36

12×4=48

12×5=60

So the first five multiples of 12 are 12,24,36,48,60.

a.8×1=8

8×2=16

8×3=24

8×4=32

8×5=40

So the first five multiples of 8 is 8,16,24,36,40.

d.9×1=9

9×2=18

9×3=27

9×4=36

9×5=45

So the first five multiples of 9 are 9,18,27,36,45

c.10×1=10

10×2=20

10×3=30

10×4=40

10×5=50

So the first five multiples of 10 are 10,20,30,40,50.

e.15×1=15

15×2=30

15×3=45

15×4=60

15×5=75

Hope it helps.