Page 355 - Start Up Mathematics_7

Section B Section D
11. 3 × 1 = 3 = 1 × 3; 1 is the multiplicative identity
4. (a) Triangular prism (b) Mean = (c) Rectangle
12. 13. ` 24 14. − 2 , 4 , 6 , 8 (d) Range = 25 – 3 = 22
− 7 14 21 28 (e) The event occurs 7 times out of 10
15. 5t 16. –5x – 11 17. 14, 16, 18 Section E
6
Section C 5. 40 cm 6. x = 14
18. 3 min 18 s 19. 140 20. Table ` 180, Chair ` 140 Project Work
21. 10 years

Section D
1
22. 23. ` 2,520 24. ` 6,606
5
25. length 29 cm; width 11 cm Sample Test Paper 6
Section A
Sample Test Paper 4
1. C 2. B 3. D 4. C 5. B
Section A 6. C 7. C 8. D 9. B 10. C

1. (a) D (b) D (c) A (d) B (e) A Section B
Section B 11. 49 m, 3,773 m 2 12.
2. (a) True (b) False (c) True (d) True (e) False 2 2
Section C
3. (a) corresponding or alternate 13. 120°, 60° 14. 55

(b) exterior (c) adjacent (d) diameter 15. Find the other leg and apply SAS construction criterion
16. 40 cm 17. 4 cm by 2 cm by 2 cm
2
(e) hypotenuse, sum
Section C
Section D 18. AB = BA (common)
4. (a) (i) ∠Q (ii) PR (iii) ∠R (b) Yes, its possible ∠ABC = ∠BAD (each 90°)
(c) 70° AC = BD (given)
(d) Median of a triangle joins the vertex to the midpoint (a) ∆ ABC ≅ ∆ BAD (by RHS rule)
of opposite side. Altitude is a perpendicular drawn (b)  ∠ABC ≠ ∠ABD  ∆ ABC ∆ ABD
from the vertex to the opposite side. 19. (a) 28 (b) 35.3 years (c) 26 years
(e) 45° 20. (a) 60° (b) 120° (c) 60°
21. base = 24 cm, altitude = 30 cm
Section E
Section D
5. x = 135°, y = 150°, z = 30°
22. 875 m ; ` 4,375
2
6. (a) AB = AC, AD = AD (common) 23. Y
∠ADB = ∠ADC (each 90°) Scale: 1 unit = 10 students
(b) Yes (by RHS rule) 100
(c) Yes (by CPCT) (d) Yes (by CPCT) 90

Sample Test Paper 5 70
60
Section A Number of students 80
1. (a) B (b) D (c) C (d) A (e) B 50
40
Section B 30
2. (a) True (b) True (c) False (d) False (e) False 20
Section C 10 X
3 0 Baseball Football Cricket Hockey Swimming
3. (a) 2 (b) 10,000 (c) 4 (d) mode (e) Favourite sport
5
347