Page 186 - New Medley 4 Semester 1

C. Fill in the blanks.
1. The smallest factor of every number is .

2. 2 × 5 = 10, so and are the factors of 10.

3. The largest factor of 20 is .

4. 7 has only factors which are and .

5. 3 × 5 × 7 = 105, so, 3, 5 and 7 are the of 105.

D. 1. Identify the factors of 90 in the following.

8, 6, 9, 3, 10, 12, 18, 25

2. Which of the following are not the factors of 48?

2, 3, 4, 5, 6, 7, 9, 12, 20

3. Can you write a factor of 60 greater than the number itself?

4. Write all the factors of 36 except 1 and the number itself.

E. Write the common factors of:
1. 6, 8 2. 15, 25 3. 24, 36 4. 72, 120

5. 60, 90 6. 64, 96 7. 75, 125 8. 84, 126

Multiples

1 2 3 4 5 6 7 8 9 10 11

Shridhi makes a pile of bottles. She tries to hit every second bottle with
a ball. List the number of bottles on which she would hit.

These numbers are 2, 4, , , , …

The numbers 2, 4, 6, 8, 10 and so on are multiples of 2. We can find multiples

of a number by multiplying it with 1, 2, 3, 4,.... These numbers are counting
numbers.

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