Page 59 - Math Skill - 4

Factors and Multiples 57

Multiples of 6 are 6, 12 , 18, 24, ...

The first common multiple of 4 and 6 is 12.
Thus, the LCM of 4 and 6 is 12.

Exercise 4.2

1. Fill in the blanks.
(a) 8 × 3 = 24, so 24 is a multiple of _________ and _________.

(b) The smallest multiple of 7 is _________.
(c) The first multiple of a number is _________.
(d) Every number is a multiple of _________.

(e) Any number has _________ number of multiples.
2. Check and answer in Yes and No.

(a) 27 is a multiple of 9. (b) 121 is a multiple of 11.
(c) 108 is a multiple of 7. (d) 96 is a multiple of 9.
(e) 95 is a multiple of 5. (f) 120 is a multiple of 10.

3. Find the first common multiple of:

(a) 7 and 4 (b) 2 and 6 (c) 8 and 7 (d) 12 and 13
(e) 6 and 9 (f) 3 and 8 (g) 11 and 12 (h) 18 and 5
4. Find the first three common multiples of:

(a) 3 and 6 (b) 4 and 8 (c) 5 and 4
(d) 7 and 3 (e) 6 and 8 (f) 5 and 7

5. Write the multiples of 6 that are greater than 20 but less than 50.
6. Write all the multiples of 17 that are less than 80.

7. Write all the multiples of 19 that are 2-digit numbers.
8. Find the LCM of

(a) 5 and 10 (b) 5, 6 and 10 (c) 6 and 8

Different Types of Numbers

Even and Odd Number

Numbers that are multiples of 2 or leave no remainder when divided by 2 are called even
numbers.

All the numbers with 0, 2, 4, 6 and 8 at ones place are even numbers.
Numbers that are not multiples of 2 or are not even are called odd numbers.

All the numbers with 1, 3, 5, 7 and 9 at ones place are odd numbers.