Page 104 - Start Up Mathematics_4

Example 12: Is 286 divisible by 2?

Solution: In 286, 6 is at the ones place. It is an even number. So, 286 is divisible by 2.

Example 13: Is 342 divisible by 3?
Solution: 342 → 3 + 4 + 2 = 9

9 is divisible by 3. So, 342 is divisible by 3.
Example 14: Is 140 divisible by 5?

Solution: In 140, 0 is at the ones place. So, 140 is divisible by 5.

EXERCISE 7.3

1. Which of the following numbers are divisible by 2?

(a) 96 (b) 132 (c) 443 (d) 105 (e) 274 (f) 370
2. Which of the following numbers are divisible by 3?

(a) 83 (b) 126 (c) 219 (d) 317 (e) 543 (f) 906
3. Which of the following numbers are divisible by 5?

(a) 160 (b) 295 (c) 384 (d) 432 (e) 730 (f) 810
4. Which of the following numbers are divisible by 10?

(a) 100 (b) 209 (c) 780 (d) 560

LET’S EVALUATE

1. Find three common multiples of the following numbers.
(a) 3, 4 and 6 (b) 8 and 12 (c) 10, 15 and 20

2. Write the first six multiples of the following numbers.
(a) 9 (b) 11 (c) 12 (d) 15

3. Complete the following sequence.
(a) 18, 22, 26, 30, _______, _______, _______

(b) 15, 20, _______, _______, _______, 40, _______
4. Find the following factors.

(a) Factors of 6 = _____________________
Factors of 10 = _____________________
Common factors of 6 and 10 = _____________________

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