Page 318 - ICSE Math 7

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12. proper 13. ac : bd 14. mean 15. 16 16. 17.28 38. (a) 9 (b) 7
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3 39. Square garden is larger in area by 4 m .
17. cost price 18. marked 19. 5% 20. amount 21. 20 40. 19 cm; 15 cm 41. Students to do on their own
22. 26,400 23. like 24. constant 25. 12 26. solution 42. Students to do on their own 43. 18 44. 21
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27. linear 28. truth set 29. 38° – x 30. parallel 45 (a) (b) 46. (a) 4 (b) 2
31. vertical 32. Centroid 33. congruent 34. 75° 2 4 15 5
35. infinite 36. 1 37. proportional 38. sphere Long Answer Type Questions
39. exterior 40. greater 41. 9 cm 42. square unit; unit 1. –36 2. –5 –4 –3 –2 –1 0 1 2 3 4 5
43. median 44. frequency 45. equally likely 46. event 3. –5 4. 12 green gems 5. (a) 7.353 (b) 483.9
Multiple Choice Questions 21 –2 5 2 3 7
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1. (d) 2. (c) 3. (c) 4. (d) 5. (b) 6. (a) 6. 99 7. 5 8. 9. 7 × 2 × 11 10. 9
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7. (d) 8. (a) 9. (d) 10. (c) 11. (b) 12. (c) 11. (a) 20 (b) 15 12. (a) {14} (b) {14. 16}
13. (a) 14. (b) 15. (d) 16. (a) 17. (a) 18. (c) (c) {10, 12, 14, 16, 18} 13. 2 years 14. 36 hours
19. (b) 20. (a) 21. (d) 22. (a) 23. (b) 24. (d) 15. ` 25,891.25 16. 24 people 17. ` 31,240
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25. (d) 26. (b) 27. (c) 28. (d) 29. (d) 30. (a) 18. Loss = 16% 19. 5 years 20. 2.5% 21. 72 s
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31. (d) 32. (b) 33. (b) 34. (d) 35. (b) 36. (b) 22. 8 h 12 min 23. 2x y + 7xy – 10y + 2
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37. (c) 38. (d) 39. (d) 40. (c) 41. (d) 42. (a) 24. 2(7a – 5b) cm 25. 8 cm; 13 cm 26. 5
43. (b) 44. (d) 45. (a) 46. (b)
27. y ≤ 4.5 0 1 2 3 4 5
Short Answer Type Questions 28. {…, –3, –2, –1, 0, 1, 2, 3, 4} 29. 40°; 65°
1. (a) –4,400 (b) 32 2. –5 + 28 + |–9| 30. 48° 31. x = 45°; y = 135°; z = 45° 32. 114°
32 1
3. a = 65; b = 63 4. or 5. 15.4 6. 12.1 33. DXYZ ≅ DPYQ (by SAS)
512 16
5 56 34. DABE ≅ DACD (By SAS)
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7. 8. 9. 5 10. 7 × 2 7
21 64 DC = EB (By CPCT)
11. (a) {1, 2, 4, 8, 16} (b) {S, U, C, E, O, R} 35. 5 Y
12. (a) {–3, –2, –1, 0, 1, 2, 3} (b) {–1, 0, 1, 2} 4
13 56 : 40 or 7 : 5 14. 3 3 15. 4.9% 16. 400
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17. Loss = 25,000 18.12.5% 19. 2 years C(–1, 2) 2
20. ` 10,000 21. 7 hours 22. 39 m s –1 X' 1 X
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3 2
2 5
23. (a) 7m n ; – 4m n ; 3mn; – 15 (b) –4n ;7m (c) 7 O
24. (3x + 6y + 4) cm 25. 12 years; 40 years –4 –3 –2 –1 –1 1 2 3 4 5
26. 18; 30 27. {0, 1, 2, 3} 28. {–4, –3} 29. 53° 45’ 55’’ B(–3, –2) –2
30. 115° 31. (a) x = 65°; y = 50° (b) x = 87°; y = 53° –3 A(5, –3)
32. 40°; 70° –4 Y'
33. (a) ∠L = ∠X = 45° (b) ∠N = ∠Z = 75° (c) YZ
34. Their measure should be equal. 36. (a) Yes; 3 (b) Yes; 2 37. 30 38. 9 cubes
35. (a) vertical (b) vertical (c) horizontal 39. Students to do on their own.
40. Students to do on their own.
36.
41. (a) 400 m (b) 100 m (c) 10,000 m 2
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42. 46 cm 43. Mean = 15; Median = 14 Mode = 12
44. Y
150
140
Number of vehicles (in thousands)
130
37. Isometric sketch 120
Oblique sketch 110

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2005 2006 2007 2008 2009 2010
Years
3 cm
3 cm
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4 cm 45. (a) (b) (c) (d) 46. 1
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