Page 326 - ICSE Math 8

39. diameter 40. finite 41. 10 42. area 44. 7 cm
6
43. 1000 44. 12 cm 45. frequency 46. 48 45. To avoid errors in counting large number of observations,
47. experiment 48. deterministic vertical bars or lines called tally marks are used to mark
the frequencies.
Multiple Choice Questions 3 1
1. (a) 2. (b) 3. (b) 4. (d) 5. (a) 46. Students to do on their own. 47. 5 48. 4
6. (c) 7. (b) 8. (c) 9. (a) 10. (c) Long Answer Type Questions
11. (b) 12. (a) 13. (b) 14. (d) 15. (b) 1. 1 2. − 11 − , 6 , 3 , 5 , 9 3.  − 3  9
16. (d) 17. (a) 18. (c) 19. (b) 20. (a) 111 17 17 17 17 17   5  
2
6
21. (a) 22. (b) 23. (c) 24. (d) 25. (d) 4. (–3) 5. 7 6. 900 7. (a) 22 (b) –36
26. (b) 27. (c) 28. (a) 29. (d) 30. (b) 8. 5 9. 4 10. M = 2, N = 9, P = 1
31. (b) 32. (c) 33. (a) 34. (d) 35. (c) 11. φ, {–2}, {4}, {6}, {–2, 4},{4, 6},{6, –2}, {–2, 4, 6}
36. (c) 37. (d) 38. (b) 39. (a) 40. (a) 12. 68 13. 25% 14. 264 15. 120, 150, 180
41. (d) 42. (b) 43. (a) 44. (d) 45. (c) 16. First part = ` 1,250; Second part = ` 2,000;
46. (b) 47. (d) 48. (b) Third part = ` 3,000
17. 4 days 18. 3 7 hours 19. Loss% = 1 %
Short Answer Type Questions 11
 − 2  3 20. Single discount of 30% is better 21. ` 35,42,400
1. Infinite 2. Zero 3.   4. 2 –3
 5  22. Amount = ` 13659.08; C.I.= ` 1159.08
5 23. 9a – 16a + 39a –30 24. x + 2x + 7x
2
4
3
3
5. 0.3 6. 2 7. 8. 1,296
7 25. 10,710 26. (4x + 9x + 12x) sq. units
2
9. 1 4 10. No 11. Yes 12. {1,2,3,6}) 27. 18x z (2y z – 3x + 5x y ) 28. (2x + 3y)(2x + 3y – 4)
2 2
2 2
2 2
3
+ 5 7 29. 480 km
6 1 30. Tanu’s age = 10 years, Ranu’s age = 18 years
31. 60°, 80°, 100°, 120° 32. 3
13. 30% 14. 25% 15. 45 16. 16 17. 120 kg 33. Students to do on their own.
4
18. 30 days 19. 4 % 20. ` 62.4 34. Students to do on their own.
9
21. It means depreciation or decrease in the value of an asset. 35. A net for a 3D shape is its outline in
6 2 dimensions which when folded regains
22. 1,650 23. a b 24. 4 25. 2 26. 8 the three-dimensional shape.
6 5
25
27. 1, 7, p, q, 7p, 7q, pq, 7pq 28. 6(x + 3) 36. Students to do on their own.
2
29. 144 30. 21, 23 and 25 31. 21, 23 and 25 37. (–1, 0), (3, –2), (0, 4) and (–3, –3) 38. 6
32. 30°, 60° and 90° 39. 10 cm
33. Yes, because all the sides of a square are equal and all 40. Prove yourself, Hint: Use property of equality of two
tangents drawn from a point
angles are right angles
2
2
34. The triangle inequality property and the Angle-sum 41. 129 m , ` 16189.50 42. 16 35 m )
2
2
property of a quadrilateral 43. 432 cm , 288 cm , 15.6 cm 44. 528 m 2
35. A cylinder and a cuboid 36. A hexagonal prism 45. 0.5–20.5, 20.5–40.5, 40.5–60.5
37. 120° 38. (– 9, 5) 39. 3 cm 40. 45° 46. h = 0.5, 4.5–15.5, 15.5–26.5, 26.5–37.5, 37.5– 48.5
41. 154 cm 42. 27p cm 43. 83,006 cm 3 47. 2 48. 2
2
2
3 7

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