Punjab State Board PSEB 5th Class Maths Book Solutions Chapter 3 HCF and LCM Ex 3.1 Textbook Exercise Questions and Answers.

## PSEB Solutions for Class 5 Maths Chapter 3 HCF and LCM Ex 3.1

Question 1.

Write the first five multiples of the following numbers :

(a) 5

(b) 9

(c) 10

(d) 12

(e) 16

(f) 17

Solution:

(a) Multiples of 5 = 5, 10, 15, 20, 25

(b) Multiples of 9 = 9, 18, 27, 36, 45

(c) Multiples of 10 = 10, 20, 30, 40, 50

(d) Multiples of 12 = 12, 24, 36, 48, 60

(e) Multiples of 16 = 16, 32,48, 64, 80

(f) Multiples of 17 = 17, 34, 51, 68, 85

Question 2.

Find the factors of the given numbers :

Solution:

(a) 1, 5

(b) 1, 2, 4, 8

(c) 1, 2, 7, 14

(d) 1, 2, 3, 4, 6, 12

(e) 1, 5, 25

(f) 1, 2, 3, 4, 6, 9, 12, 18, 36

Question 3.

Write the factors of the following numbers :

(a) 18

(b) 24

(c) 35

(d) 36

(e) 45

(f) 21

Solution:

(a) 1, 2, 3, 6, 9, 18

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

(c) 1, 5, 7, 35

(d) 1, 2, 3, 4, 6, 9, 12, 18, 36

(e) 1, 3, 5, 9, 15, 45

(f) 1, 3, 7, 21.

Question 4.

Find out the even numbers from the following :

Solution:

(a) 12, 34, 16, 28

(b) 48, 72, 90

(c) 450, 568, 664, 98

(d) 456, 968, 604, 888

(e) 136, 446, 1278

(f) 168, 5864.

Question 5.

Solution:

(a) 11, 23, 19, 35

(b) 45, 69, 97

(c) 451, 215, 789, 983

(d) 237, 739

(e) 631, 135, 249, 1279, 2851

(f) 49, 765, 1729, 9261, 6859.

Question 6.

Fill in the blanks :

(a) If 4 × 9 = 36 then factors of 36 are …….. and ………

(b) If 8 × 7 = 56 then factors of 56 are ……… and ……….

(c) If 3 × 5 × 6 = 90 then factors of 90 are ……., ……. and …….

(d) If 8 × 10 = 80, the multiple of 8 and 10 is ……….

(e) If 2 × 3 × 5 = 30, then 30, is the multiple of …….., ………. and ……..

Solution:

(a) 4, 9

(b) 8, 7

(c) 3, 5, 6

(d) 80

(e) 2, 3, 5.

Question 7.

Write True or False:

(a) 24 is a factor of 24. ____

(b) 2 is a factor of every number. ____

(c) 24 is an even number. ____

(d) 136 is an odd number. ____

(e) There are infinite multiples of a number. ____

(f) 36 is a multiple of 5 and 7. ____

(g) Sum of two even numbers is an odd number. ____

(h) Smallest even number is 0. ____

(i) 152 is an odd number. ____

(j) There are five single digit even numbers. ____

Solution:

(a) True

(b) False

(c) True

(d) False

(e) True

(f) False

(g) False

(h) False

(i) False

(j) False

Question 8.

Observe the Factorisation Pattern and complete :

Solution:

Question 9.

Look at the pattern and solve:

Solution:

Question 10.

Understand and complete the following:

Answer: