# NCERT Solutions for Class 6 Maths Chapter 3 Exercise 3.1

NCERT Solutions for Class 6 Maths Chapter 3: NCERT Solutions for Class 6 Maths Chapter 3 Playing With Numbers Exercise 3.1

## NCERT Solutions for Class 6 Maths Chapter 3 Whole Numbers Exercise 3.1

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

Solution:

(A)We can write,
24=1Ã—24
24=2Ã—12
24=3Ã—8
24=4Ã—6
24=6Ã—4
âˆ´ Factors of 24=1,2,3,4,6,12,24

(B)We can write,
15=1Ã—15
15=3Ã—5
âˆ´ Factors of 15=1,3,5,15

(C)We can write,
21=1Ã—21
21=3Ã—7
21=7Ã—3
âˆ´ Factors of 21=1,3,7,21

(D) We can write,
27=1Ã—27
27=3Ã—9
27=9Ã—3
âˆ´ Factors of 27=1,3,9,27

(E) We can write,
12=1Ã—12
12=2Ã—6
12=3Ã—4
12=4Ã—3
âˆ´ Factors of 12 = 1,2,3,4,6,12

(F) We can write,
20=1Ã—20
20=2Ã—10
20=4Ã—5
20=5Ã—4
âˆ´ Factors of 20=1,2,4,5,10,20

(G) We can write,
18=1Ã—18
18=2Ã—9
18=3Ã—6
âˆ´ Factors of 18=1,2,3,6,9,18

(H) We can write,
23=1Ã—23
âˆ´ Factors of 23=1,23

(I) We can write,
36=1Ã—36
36=2Ã—18
36=3Ã—12
36=4Ã—9
36=6Ã—6
âˆ´ Factors of 36=1,2,3,4,6,9,12,18,36

2. Write first five multiples of:
(A) 5
(B) 8
(C) 9

Solution:

(A) 5Ã—1=5, 5Ã—2=10, 5Ã—3=15, 5Ã—4=20, 5Ã—5=25
âˆ´ First five multiples of 5 are 5,10,15,20,25.

(B) 8Ã—1=8, 8Ã—2=16, 8Ã—3=24, 8Ã—4=32, 8Ã—5=40
âˆ´ First five multiples of 8 are 8,16,24,32,40

(C) 9Ã—1=9, 9Ã—2=18, 9Ã—3=27, 9Ã—4=36, 9Ã—5=45
âˆ´ First five multiples of 9 are 9,18,27,36,45.

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

Solution:

(i)â†’(b), (ii)â†’(d), (iii)â†’(a), (iv)â†’(f), (v)â†’(e)

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

Solution:

Multiples of 9 up to 100 are: 9,18,27,36,45,54,63,72,81,90,99.