Page 80 - Maths Class 04

Practice - 5.7
Practice - 5.7
Practice - 5.7
Practice - 5.7
1. Find the first 10 multiples of the following numbers, then find their LCM.

a. 18 and 20 b. 9 and 15 c. 4, 6 and 8

d. 9, 15 and 18 e. 16, 20 and 10

2. Find the first 5 common multiples of the following numbers.

a. 18 and 27 b. 14 and 21 c. 15 and 25

d. 6 and 9 e. 20 and 30

3. By Prime factorisation method, find the LCM of the following numbers.

a. 24,32 and 36 b. 300 and 106 c. 110 and 240

d. 45,36 and 28 e. 25,45,63 and 84 f. 24, 36, 48 and 54

4. Find the LCM of the following numbers.

a. 24, 36 and 32 b. 5, 10, 18 and 20

c. 10, 14, 30, 38 and 58 d. 30, 58, 60, 70 and 120

e. 192, 288, 576 and 480 f. 40, 60, 75, 120 and 150

Complete the following crossword by writing the answers in words.

Across Down

1. Multiple of 7 1. Number of times 10 divides by 5

3. Multiple of 5 2. Multiple of 10

5. Factor of 24 4. Factor of 27

6. Has factors 2 and 5 6. Factors of 27
1 2
9. Factors of 42 7. Factors of 6

3 4
5
There’s a tip if you’re stuck.

The numbers are given below, but they’re 6 7
mixed up and aren’t written in words plus

a word meaning double : 8
9
2, 3, 6, 7, 8, 9, 10, 20 21, 60

Mathematics-4 80