Page 153 - New Medley 5 Semester 1

Now, memorise the important points:

Z Z The smallest multiple of a number is the number itself.

Z Z The largest multiple of any number cannot be obtained.

Z Z Every number has endless multiples.

Z Z The multiple of a number is greater than or equal to the number.

Z Z The number of multiples of a number cannot be counted.

EXERCISE 3.1

A. Fill in the blanks.

1. Every number except 1 has at least factors.

2. is a factor of every number.

3. The of a number is greater than or equal to the number.

4. There are multiples of every number.

5. If 7 × 11 = 77, then is a of 7 and 11.

6. If 2 × 3 × 5 = 30, then , and are of 30.

B. Write the factors of each of the following.

1. 20 2. 24 3. 30

4. 36 5. 40

C. Which of the following is not a factor of 36?

1. 4 2. 8 3. 16

4. 12 5. 18

D. Write the common factors of the following pairs.
1. 8, 10 2. 10, 15 3. 12, 18

4. 16, 20 5. 24, 32

E. Write the first five multiples of each of the following.
1. 5 2. 6 3. 9

4. 11 5. 14

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