Page 298 - ICSE Math 6

Question Bank 25. 7 divided by b when increased by 3 gives b.
26. x = –4 27. Students to do on their own.
True or False 28. (a) Infinite (b) 1 (c) 1 29. 160° 46′ 45″
1. False 2. True 3. True 4. False 5. True 30. Students to do on their own.
6. True 7. False 8. False 9. True 10. False 31. Students to do on their own.
11. False 12. True 13. False 14. True 15. False 32. Students to do on their own. 33. 1 34. 5 cm
16. True 17. True 18. False 19. True 20. True 35. Students to do on their own.
21. False 22. True 23. True 24. True 25. False 36. 5 m 37. No 38. 3
26. True 27. True 28. False 29. False 30. True
31. False 32. True 33. True 34. False 35. True 39. 40. 5 41. 6 m 42. 28 m
36. True 37. False 38. True 39. True 40. False
41. True 42. True 43. False 44. True
43. Students to do on their own. 44. 84
Fill in the Blanks Long Answer Type Questions
1. 2,043 1. ` 7,00,00,000 2. 22,95,510 3. 2,66,700
2. 9 × 10,000 + 4 × 1,000 + 0 × 100 + 8 × 10 + 9 × 1 4. ` 20,000 5. –641 < –461 < –416 < –146 < 164 < 614
3. 60 4. 0 5. 11 6. –20 7. 5; 10; 15 6. 1,500 ft 7. 2 8. 4,405 9. 11.25 m
1
8. 4 9. unlike 10. 4 11. 0.25 12. 12.456 2 3 12 11 7
2 10. < < < < 11. 3.536 km 12. 131.734
5
5
13
6
15
13. not defined 14. empty 15. 2 : 1 16. 4 13. Finite set: B; Infinite set: A; Empty sets: M and X
17. 35 18. 25 19. more 20. 25 21. 7y 14. P = {January, March, April, May, June, July, August,
3
22. three 23. 12x 24. –7 25. y + 5 September, October, November, December}; n(P) = 11
26. 3y + 11 27. line segments 28. concurrent 15. 45 m 16. 1.6 litres; 250 km 17. 44
29. 48° 30. complementary 31. 90° 32. ∠DBC 18. 25%; 2 stamps 19. 250 m 20. 100 m
33. an isosceles 34. two 35. two 36. diameter 21. General term: n + 1; 16 term: 257
th
2
37. four 38. net 39. coincide 40. 1 41. 15 22. (a) Yes; 7 (b) b , –4b , 70b and –25
3
7
5
42. 6.25 43. 14 44. 12 (c) 1; –4; 70 (d) –25
2
2
2
Multiple Choice Questions 23. 17x – 60 24. a + ab – a b – ab ; –8 25. ` 42,500
1. (d) 2. (d) 3. (a) 4. (b) 5. (a) 26. 14; 56
6. (b) 7. (c) 8. (b) 9. (a) 10. (b) 27. (a) Triangle (b) Closed figure (c) No (d) 3
11. (d) 12. (b) 13. (d) 14. (d) 15. (b) 28. (a) 8 (b) 3 (c) 4 29. South
16. (c) 17. (a) 18. (b) 19. (c) 20. (a) 30. A = 134°; B = 134°; C = 46°
21. (c) 22. (b) 23. (d) 24. (a) 25. (b) 31. Students to do on their own.
26. (c) 27. (a) 28. (c) 29. (a) 30. (d) 32. Students to do on their own.
31. (b) 32. (c) 33. (a) 34. (c) 35. (b) 33. No, as in a right triangle there is no obtuse angle.
36. (c) 37. (a) 38. (a) 39. (c) 40. (c) 34. The point of intersection of altitudes of a triangle is known
41. (b) 42. (c) 43. (a) 44. (b) as the orthocentre.
35. Students to do on their own.
Short Answer Type Questions 36. A sector of a circle is the region bounded by two radii
1. 66,630 2. 3,60,000 3. 1,33,00 4. 50,000 and an arc of the circle.
5. –426 6. –6 7. 25 = 5 + 7 + 13 8. Yes 37. Students to do on their own.
77 75 66 18
9. , and 10. 11. ` 18.02
165 165 165 25 38.
12. 54.844 13. {1, 2, 3, 4, 5, 6, 7, 8, 9}
Side view
Front view
14. B = {0, 1, 2, 3, 4} 15. 300, 400 16. 21 : 35 39. Students to do on their own. Top view
17. 0.225% 18. 55 19. 162 km 20. Boat A 40. (a) 2 (b) No (c) 6 41. 0.9 m
21. 120n 42. 1,960 sq. cm
2
3
22. Terms: m , 7n , 5mn and 23; Constant term: 23 43. (a) 16.25 hours (b) 17.5 hours (c) In weeks 2 and 4
4 3
3 2
23. 33 24. 80x b + 16x b 44. 9
282