Page 188 - Maths Class 04

3. a. 288 b. 15900 c. 2640 d. 1260 e. 6300 f. 432
4. a. 288 b. 180 c. 115710 d. 24360 e. 2880 f. 600
Practice 5.8
1. a., b., d. and e. 2. c. and f. 3. Divisible by 5 are a, b, c, e and f; Divisible by 10 are b and c.
4. Divisible by 3 are a, b, c, e and f; Divisible by 9 are a, c, e and f.
Sum up
1. a. ii b. i c. i d. iv e. iv f. iii g. iii h. ii
2. a. 24, 30, 36 b. 100, 125, 150 c. 20, 25, 30 d. 32, 40, 48
3. a. b. c. d. e.
24 36 48 64 60

2 12 2 18 2 24 2 32 2 30

2 6 2 9 2 12 2 16 2 15

2 3 3 3 2 6 2 8 3 5

2 3 2 4
4. 6, 12, 18, 24
5. a. Multiples of 2 = 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 2 2
Multiples of 3 = 6, 12, 18, 24, 30
Common Multiples = 6, 12, 18, 24, 30
b. Multiples of 4 = 4, 8, 12, 16, 20, 24, 28
Multiples of 6 = 6, 12, 18, 24, 30
Common Multiples = 12, 24
6. a. 30, 60, 90 b. 21, 42, 63 c. 12, 24, 36 d. 10, 20, 30
7. a. 25, 50, 75, 100, 125 b. 4, 8, 12, 16, 20 c. 12, 24, 36, 48, 60 d. 5, 10, 15, 20, 25
8. a. 1, 2, 4, 5, 10, 20 b. 1, 2, 3, 4, 6, 12 c. 1, 2, 4, 7, 14, 28 d. 1, 2, 3, 4, 6, 9, 12, 18, 36
e. 1, 2, 3, 4, 6, 8, 12, 24
9. a. 1, 3, 5, 9, 15, 45 b. 1, 2, 4, 8, 16, 32, 64 c. 1, 2, 3, 4, 6, 9, 12, 18, 36 d. 1, 2, 3, 6, 13, 26, 39, 78
e. 1, 2, 4, 5, 10, 20, 25, 50, 100
10. a. 4, 6 b. 3, 9 c. 40 d. 6 × 9 = 54 e. factor f. multiple
Chapter-6 Fractions
Practice 6.1
2 4 5 2
1. a. one-fourth b. half 2. a. b. c. d. 3. Do it yourself
5 6 15 8
Practice 6.2
1. a. 6 flowers b. 6 balls c. 6 stars d. 8 pencils 2. Do it yourself 3. 18 sweets
Practice 6.3
1. Do it yourself 2. a. 10 b. 9 c. 35 d. 4 e. 21 f. 12
Practice 6.4
1. a. Like b. Unlike c. Unlike d. Like
2. a. > b. > c. > d. > e. < f. <
2 3 4 5 15 17 18 21 22 2 3 4 5 9 10
3. a. , , , b. , , , , c. , , , , ,
5 5 5 5 24 24 24 24 24 11 11 11 11 11 11

1 2 3 4 5 6 1 2 4 7 8 9 1 3 4 5 6 8
d. , , , , , e. , , , , , f. , , , , ,
7 7 7 7 7 7 10 10 10 10 10 10 9 9 9 9 9 9
7 6 8 9 2 2 1 4
4. a. b. c. d. 5. a. b. c. d.
8 6 9 12 9 8 11 15
Practice 6.5
2 3 5 2 3 5 6 5 11 1 1 2 3 3 6
1. a. + = b. + = c. + = d. + = e. + =
6 6 6 8 8 8 18 18 18 3 3 3 4 4 4
9 9 6 5 5 8 5 9 7 7
2. a. b. c. d. 3. a. b. c. d. e. f.
8 7 9 9 9 3 11 13 9 8

Mathematics-4 188