1 of 4

Sol.

Express each number as a product of its prime factors:

Q.1

140

(i) 140

140

70

35

2

2

5

7

7

1

140 = 22 × 5 × 7

Sol.

156

(ii) 156

156

78

39

2

2

3

13

13

1

156 = 22 × 3 × 13

Sol.

3825

(iii) 3825

3825

1275

425

3

3

5

85

5

17

3825 = 32 × 52 × 17

17

1

Exercise 1.2

2 of 4

Sol.

5005

(iv) 5005

5005

1001

143

5

7

11

13

13

1

5005 = 5 × 7 × 11 × 13

Sol.

7429

(v) 7429

7429

437

23

17

19

23

1

7429 = 17 × 19 × 23

Express each number as a product of its prime factors:

Q.1

Exercise 1.2

3 of 4

(i) 1000

1000

500

250

2

2

2

125

5

25

Q.

Express each number as a product of its prime factors:

Sol.

5

1

5

5

1000

=

2

×

2

×

2

×

5

×

5

×

5

=

23

×

53

4 of 4

(ii) 72

Q.

Express each number as a product of its prime factors:

Sol.

72

36

18

2

2

2

9

3

3

1

3

72

=

2

×

2

×

2

×

3

×

3

=

23

×

32