Class 6, Maths, Chapter 3, Exercise 3.1 Solutions
Q.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
Ans:
(a) 24
24 = 1 × 24
24 = 2 × 12
24 = 3 × 8
24 = 4 × 6
24 = 6 × 4
Hence, the factors of 24 are 1, 2, 3, 4, 6, 8, 12 and 24
(b) 15
15 = 1 × 15
15 = 3 × 5
15 = 5 × 3
Hence, the factors of 15 are 1, 3, 5 and 15
(c) 21
21 = 1 × 21
21 = 3 × 7
21 = 7 × 3
Hence, the factors of 21 are 1, 3, 7 and 21
(d) 27
27 = 1 × 27
27 = 3 × 9
27 = 9 × 3
Hence, the factors of 27 are 1, 3, 9 and 27
(e) 12
12 = 1 × 12
12 = 2 × 6
12 = 3 × 4
12 = 4 × 3
Hence, the factors of 12 are 1, 2, 3, 4, 6 and 12
(f) 20
20 = 1 × 20
20 = 2 × 10
20 = 4 × 5
20 = 5 × 4
Hence, the factors of 20 are 1, 2, 4, 5 10 and 20
(g) 18
18 = 1 × 18
18 = 2 × 9
18 = 3 × 6
18 = 6 × 3
Hence, the factors of 18 are 1, 2, 3, 6, 9 and 18
(h) 23
23 = 1 × 23
23 = 23 × 1
Hence, the factors of 23 are 1 and 23
(i) 36
36 = 1 × 36
36 = 2 × 18
36 = 3 × 12
36 = 4 × 9
36 = 6 × 6
Thus, the factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18 and 36
Q.2. Write first five multiples of:
(a) 5
(b) 8
(c) 9
Ans:
(a) First five multiples of 5 are:
5 × 1 = 5
5 × 2 = 10
5 × 3 = 15
5 × 4 = 20
5 × 5 = 25
Hence, the first five multiples of 5 are 5, 10, 15, 20 and 25
(b) First five multiples of 8 are:
8 × 1 = 8
8 × 2 = 16
8 × 3 = 24
8 × 4 = 32
8 × 5 = 40
Hence, the first five multiples of 8 are 8, 16, 24, 32 and 40
(c) First five multiples of 9 are:
9 × 1 = 9
9 × 2 = 18
9 × 3 = 27
9 × 4 = 36
9 × 5 = 45
Hence, the first five multiples of 9 are 9, 18, 27, 36 and 45
Q.3. Match the items in column 1 with the items in column 2.
Ans: (i)→(b), (ii) → (d), (iii) → (a), (iv) → (f), (v) → (e)
Q.4. Find all the multiples of 9 upto 100.
Ans:
All the multiples of 9 up to 100 are:
9 × 1 = 9
9 × 2 = 18
9 × 3 = 27
9 × 4 = 36
9 × 5 = 45
9 × 6 = 54
9 × 7 = 63
9 × 8 = 72
9 × 9 = 81
9 × 10 = 90
9 × 11 = 99
∴ All the multiples of 9 upto 100 are:
9, 18, 27, 36, 45, 54, 63, 72, 81, 90 and 99.
NCERT Solutions For Class 6 Maths, Chapter 3 Playing With Numbers (All Exercises)
Class 6, Maths, Chapter 3, Playing With Numbers
Class 6, Maths, Chapter 3, Playing With Numbers, Exercise 3.1 ← You are here
Class 6, Maths, Chapter 3, Playing With Numbers, Exercise 3.2
Class 6, Maths, Chapter 3, Playing With Numbers, Exercise 3.3
Class 6, Maths, Chapter 3, Playing With Numbers, Exercise 3.4
Class 6, Maths, Chapter 3, Playing With Numbers, Exercise 3.5
Class 6, Maths, Chapter 3, Playing With Numbers, Exercise 3.6
Class 6, Maths, Chapter 3, Playing With Numbers, Exercise 3.7