## Chapter 3 Playing With Numbers Exercise 3.1

**Question 1: Write all the factors of the following numbers:**

a) 24

b) 15

c) 21

d) 27

e) 12

f) 20

g) 18

h) 23

i) 36

Answer:

a) 24

b) 15

c) 21

d) 27

e) 12

f) 20

g) 18

h) 23

i) 36

Answer:

(a) 1, 2, 3, 4, 6, 8, 12, 24

b) 1, 3, 5, 15

c) 1, 3, 7, 21

d) 1, 3, 9, 27

e) 1, 2, 3, 4, 6, 12

f) 1, 2, 4, 5, 10, 20

g) 1, 2, 3, 6, 9, 18

h) 1, 23

i) 1, 2, 3, 4, 6, 9, 12, 18, 362

**Question 2: Write first five multiples of :**

a) 5

b) 8

c) 9

Answer:

a) 5

b) 8

c) 9

Answer:

a) 5 - 5, 10, 15, 20, 25

b) 8 - 8, 16, 24, 32, 40

c) 9 - 9, 18, 27, 36, 45

**Question 3: Match the items in column 1 with the items in column 2.**

Column 1 Column 2

(i) 35 (a) Multiple of 8

(ii) 15 (b) Multiple of 7

(iii) 16 (c) Multiple of 70

(iv) 20 (d) Factor of 30

(v) 25 (e) Factor of 50

(f) Factor of 20

Answer:

Column 1 Column 2

(i) 35 (a) Multiple of 8

(ii) 15 (b) Multiple of 7

(iii) 16 (c) Multiple of 70

(iv) 20 (d) Factor of 30

(v) 25 (e) Factor of 50

(f) Factor of 20

Answer:

(i) 35 - (b) Multiple of 7

(ii) 15 - (d) Factor of 30

(iii) 16 - (a) Multiple of 8

(iv) 20 - (f) Factor of 20

(v) 25 - (e) Factor of 50

**Question 4: Find all the multiples of 9 upto 100.**

Answer:The multiples of 9 upto 100 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.

Answer:

## No comments:

## Post a Comment