Page 306 - Ganit Kaushal

II. 1. mirror 2. no 3. one 4. one Exercise 10.3
5. one 6. vertical 7. multiples 1. (a) −2 (b) −2 (c) −7 (d) −5
III. 1. True 2. True 3. True 4. True (e) 8 (f) 3
5. False 6. True 7. True Miscellaneous Exercise 10.4
IV. 1. (a) one (b) six 1. (b) 2. (c) 3. (d) 4. (c)

2. (a) Two; (b) one; 5. (c) 6. (b) 7. (a) 8. (b)
9. (d) 10. (d)
3. (a) 2 lines of symmetry, angles of symmetry = 180°, 11. (a) additive inverse (b) successor
360°, least angle of symmetry = 180° (Have
Rotational Symmetry) (c) 0 (d) positive (e) right (f) 0
(b) 1 line of symmetry, Only 1 angle of symmetry = (g) negative (h) 1 (i) −1 (j) 0
360° = least angle of symmetry (No Rotational 12. (a) True (b) False (c) False (d) True
Symmetry) (e) True (f) False (g) True (h) False
4. O (i) False (j) False (k) True (l) False
5. (a) 1 line of symmetry (b) 1 line of symmetry 13. (a) → (iv) (b) → (v) (c) → (ii) (d) → (i)
(c) 7 lines of symmetry (e) → (iii)
6. (a) lines of symmetry = 0, 14. No. 15. 5, 11 16. 0
order of rotational symmetry = 6, 17. (a) –81 (b) 150 (c) –77
least angle of symmetry = 60°
(b) lines of symmetry = 0, 18. (a) –24 (b) 6 (c) –5 (d) 20
order of rotational symmetry = 4, (e) –60 (f) –8 (g) –7 (h) 0
least angle of symmetry = 90° (i) 0 (j) −114 (k) −31
(c) lines of symmetry = 0, 19. (a) 0 (b) 2 (c) 7
order of rotational symmetry = 2, 20. (a) credit (b) +160 (c) debit (d) +130
least angle of symmetry = 180°
(e) debit (f) −20
(g) yes, some banks allow −ve balance (h) +180
Chapter 10: The Other Side of Zero
21. −30 22. 1 23. (a) 10 (b) 24
Exercise 10.1
1. (a) 0 (b) +2 (c) (–2) (d) +2 Assertion Reason Type Questions
2. (a) –17 (b) 13 (c) 11 (d) –25 1. (b) 2. (d) 3. (a) 4. (a)
3. (a) −3 (b) −2 (c) +3 (d) +2 5. (d) 6. (c)
(e) 6 (f) +1 (g) −3 (h) 0 Case Study Based Questions
(i) −2 (j) 5 1. 66 marks 2. 37 marks 3. 29 marks 4. 10 marks
4. (a) > (b) > (c) < (d) > 5. 4 questions
5. (a) 17 (b) –13 (c) –11 (d) 25 Chapter Test
6. (a) +160 (b) +230 (c) +230 (d) +101 I. 1. (b) 2. (b) 3. (d) 4. (b)
(e) +101 (f) +3000 5. (b) 6. (c) 7. (c) 8. (d)
7. (a) 0 (b) 4 (c) 7 (d) −5 II. 1. negative 2. –2 3. 7 4. –9
(e) 8 (f) 4 5. 0
Exercise 10.2 III. 1. True 2. False 3. True 4. False
1. (a) −4 (b) −9 (c) −1 (d) 0 5. True
(e) −4 (f) −4 IV. 1. –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10
2. (a) −100 (b) 1142 (c) −2265 2. (a) 1 (b) 3 (c) 6 (d) 3
3. (a) 5767 (b) −436 (c) 584 3. 6 4. 62 5. –6
4. (a) −33 (b) 1 (c) −92 (d) 0 6. (a) –15 (b) –25 7. 2
5. 769 6. 4796 7. 321 8. −804 8. (a) –3 (b) 3 (c) –11
9. 550 feet below sea level 10. 17 11. 24 feet 9. (a) –20 (b) 165 (c) –1432 (d) 2

304 Mathematics-6