RBSE Solutions for Class 6 Maths Chapter 2 Relation Among Numbers Ex 2.1

RBSE Solutions for Class 6 Maths Chapter 2 Relation Among Numbers Ex 2.1 is part of RBSE Solutions for Class 6 Maths. Here we have given Rajasthan Board RBSE Class 6 Maths Chapter 2 Relation Among Numbers Exercise 2.1.

Board	RBSE
Textbook	SIERT, Rajasthan
Class	Class 6
Subject	Maths
Chapter	Chapter 2
Chapter Name	Relation Among Numbers
Exercise	Ex 2.1
Number of Questions	7
Category	RBSE Solutions

Rajasthan Board RBSE Class 6 Maths Chapter 2 Relation Among Numbers Ex 2.1

Question 1.
Write all factors of the (RBSESolutions.com) following numbers.
(i) 48
(ii) 36
(iii) 28
(iv) 100
(v) 125
Solution.
(i) Factors of 48
48 = 1 × 48
48 = 2 × 24
48 = 3 × 16
48 = 4 × 12
48 = 6 × 8
48 = 8 × 6
∴ All factors of 48 are 1, 2, 3, 4, 6, 8, 12, 16, 24 and 48.

(ii) Factors of 36
36 =1 × 36
36 = 2 × 18
36 = 3 × 12
36 = 4 × 9
36 = 6 × 6
∴ All factor of 36 are 1,2, 3, 4, 6, 9, 12, 18 and 36.

(iii) Factors of 28
28 =1 × 28
28 = 2 × 14
28 = 4 × 7
28 = 7 × 4
∴ All factors of 28 are 1,2, 4, 7, 14 and 28.

(iv) Factors of 100
100 = 1 × 100
100 = 2 × 50
1oo = 4 × 25
1oo = 5 × 20
1oo = 10 × 10
∴ All factors of loo are 1, 2, 4, 5, 10, 20, 25, 50 and 100.

(v) Factor of 125
125 = 1 × 125
125 = 5 × 25
125 = 25 × 5
∴ All factors of 125 are 1, 5, 25 and 125.

Question 2.
Write the first five multiples (RBSESolutions.com) of the following numbers :
(i) 7
(ii) 12
(iii) 17
(iv) 15
(v) 18
Solution.
(i) First five multiples of 7
7 × 1 = 7
7 × 2 = 14
7 × 3 = 21
7 × 4 = 28
7 × 5 = 35
Thus, first five multip’es of 7, are 7.

(ii) First five (RBSESolutions.com) multiples of 12
12 × 1 = 12
12 × 2 = 24
12 × 3 = 36
12 × 4 = 48
12 × 5 = 60
Thus first five multipes of 12 are 12. 24, 36, 48 and 60.

(iii) First five multiples of 17
17 × 1 = 17
17 × 2 = 34
17 × 3 = 51
17 × 4 = 68
17 × 5 = 85
Thus, first five multiples of 17 are 17, 34, 51, 68 and 85.

(iv) First five multiples of 15
15 × 1 = 15
15 × 2 = 30
15 × 3 = 45
15 × 4 = 60
15 × 5 = 75
Thus, first five multiples of 16 are 15, 30, 45, 60 and 75.

(v) First five (RBSESolutions.com) multiples of 18
18 × 1 = 18
18 × 2 = 36
18 × 3 = 54
18 × 4 = 72
18 × 5 = 90
Thus, first five multiples of 18 are 18, 36, 54, 72 and 90.

Question 3.
Write all prime numbers between 10 and 30.
Solution.
All prime numbers between 10 and 30 are 11, 13, 17, 19, 23 and 29.

Question 4.
Write the smallest (RBSESolutions.com) prime number.
Solution.
Smallest prime number is 2.

Question 5.
Which of the following numbers have 6 as a factor?
6, 10, 12, 15, 18, 25, 30, 38, 46
Solution.
Numbers 6, 12, 18, 30 have 6 as a factor.

Question 6.
Write 3 numbers which are multiples of 4 and 6.
Solution.
12 = 4 × 3, 6 × 2
24 = 4 × 6, 6 × 4
36 = 4 × 9, 6 × 6
Three numbers which are multiples of 4 and 6 are 12, 24 and 36.

Question 7.
State whether (RBSESolutions.com) True or False
(i) 108 is a multiple of 9.
(ii) 7 is a factor of 27.
(iii) The sum of two prime numbers is an even number.
(iv) Every prime number is odd.
(v) 1 is a factor of every number.
(vi) Multiple of each number is less than the number itself.
(vii) Factor of each number is less than the number itself.
Solution.
(i) True
(ii) False
(iii) False
(iv) False
(v) True
(vi) False
(vii) True

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