Page 297 - ICSE Math 6

10. ` 1,440 11. (a) 32.1 (b) 17.37 10. 60 m 11. ` 1,274 12. Area becomes one-fourth
12. (a) A = {V, W, L, S} (b) X = {–1, 0, 1} 13. 24 m 14. 176 cm 2
(c) P = {0, 1, 4, 9, 16, …} Self-Testing Exercise 6
13. (a) X = {x | x is an odd number from 1 to 15} 1.
Length of
(b) P = {x | x = 4n, n ∈ N} leaves (in cm) Tally marks Number of
leaves
(c) A = {x | x is a month having 31 days}
14. (a)1 (b) 0 (c) 7 (d) Not defined 2 1
15. (a) Null (b) Finite (c) Null (d) Infinite
3 3
Self-Testing Exercise 2
1. ` 1,050; ` 2,450 2. 3 litres 3. 1.5 hours 4. 55 m 4 2
5. (a) 65 (b) 70 6. 250 7. 800 8. 16 cm 9. ` 3,000
10. 24 11. ` 9,750 12. 500 km 13. 175 m s –1 5 4
14. 12 s 15. 55 km
6 4
Self-Testing Exercise 3
1. (a) 1 (b) 3 (c) 6 2. (a) 7a – c 7 5
2
2
2
2
2
(b) 7x y + 12xy – 6 (c) 6l + 6lm (d) –3a – 4b + c 2
2
2
3. (a) ab + bc (b) 2l + lm (c) 19 – 15p + 9p 8 1
2
2
2
3
2
2
2
(d) –4a + 2b – 20c 4. 10x y + 2yz + 4x z – 2xy z
2
5. (a) –24x + 20 (b) 16a – ab – 6b 6. 53 2. Day Number of bottles = 50 bottles
2
2
7. 6a b – 19ab ; 384 8. (a) 1 (b) 22.5
9. 5.5 m 10. 37 11. 108 12. 135, 137 Monday
13. 72 14. 9a – 2b
Self-Testing Exercise 4 Tuesday
→ → →
1. (a) A, O, B (b) OC, OA or OB Wednesday
↔
(c) AB 2. 154° 8' 30''
4. Acute: 12° and 20°, Obtuse: 99°, 105°, 114° and 148° Thursday
5. (a) 112° (b) 65° 8. 8 cm
Friday
9. A simple closed figure made up of line
segments only is called a polygon.
Saturday
10.
3. 150 cm 4. (a) 154.2 (b) 151.5
5.
600
Cuboid Cylinder 500
(Answers may vary) 400
Money spent (in `) 300

14. (a) (b) (c) 200

100
Self-Testing Exercise 5 0 Jan Feb Mar Apr May June
2
1. 48 m 2. 169 m 3. 280 m 4. 350 cm 5. 48 cm Months
2
6. 56 cm; 75 cm 7. 1,190 8. 12 cm 9. ` 4,320 6. (a) Book C (b) Book B (c) No (d) False

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