Question

Do the following sums:
1) Write all the multiples of 2 between 31 and 41?

2) Write all the factors of the following numbers:
a) 24
b) 36
c) 25

3) Write the first five multiples of:
a) 5
b) 9
c) 12

4) Find all the multiples of 9 up to 100.​

Answer 1

Answer:

1. 32,34,36,38,40

2. 24= 1,2,3,4,6,8,12,24

36= 1,2,3,4,6,9,12,18,36

25= 1,5,25

3. 5= 5,10,15,20,25

9= 9,18,27,36,45

12= 12,24,36,48,60

Answer 2

1) Multiples of 2 between 31 and 41 = even numbers between 31 and 41.

= 32, 34, 36, 38, 40,

2) a) 24

= 1*24, 2*12, 3*8, 4*6

Therefore, factors = 1,2,3,4,6,8,12,24

b) 36 = 1*36, 2*18, 3*12, 4*9, 6*6

Therefore factors = 1,2,3,4,6,9,12,18,36

c) 25 = 1*25, 5*5

Therefore factors = 1,5,25

3) a). 5*1 = 5

5*2 = 10

5*3 = 15

5*4 = 20

5*5 = 25

Hence first five multiples of 5= 5,10,15,20,25

b) 9*1 = 9

9 *2 = 18

9*3 = 27

9*4 = 36

9*5 = 45

Hence first 5 multiples of 9 = 9,18,27,36,45

c) 12*1 = 12

12*2 = 24

12*3 = 36

12*4 = 48

12*5 = 60

Hence first 5 multiples of 12 = 12,24,36,48,60

4) Factors of 9 till 100

= 9,18,27,36,45,54,63,72,81,90,99