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b. Number of square corners = 0
Number of less than square corners = 0 3. a. b. c. d.
Number of more than square corners = 6
c. Number of square corners = 2 Exercise 8B
Number of less than square corners = 3
Number of more than square corners = 0 1. a. b. c. d.
d. Number of square corners = 0 2. a. b. c. d.
Number of less than square corners = 0
Number of more than square corners = 5 3. a. 17, 21, 25, 29 b. 220, 270, 320 c. 13, 21, 34 d. 40, 45, 50
11. e. 141, 151, 161 f. 1075, 1085, 1095 g. Def, Efg, Fgh h. K, M, O
Exercise 8C
2. Honeycomb, chessboard 3. Fish

Exercise 8D
1. a. Front, Side, Top b. Front, Top, Side c. Side, Top, Front
2. a. Front view b, Side view c. Top view
3. a. West b. West c. East d. West
Learning Logs
Exercise 7C
1. a 2. c 3. b 1. a. b. c. d.
4. a. Number of straight lines = 12; Number of curved lines = 6
b. Number of straight lines = 12; Number of curved lines = 6 2. 8 lines of symmetry (Answer may vary)
5. Shapes made by straight lines = 25; Shapes made by curved lines = 5
Learning Logs 3. a. b.
1. a. 3, 3 b. 4, 4 c. equal d. opposite
e. no, no c. d.
2. a. cone b. cylinder c. cuboid d. sphere
e. cube e.
3. a. 18 rectangles b. 8 triangles
c. 5 triangles, 1 square, 3 rectangles 4. a. b. c.
d. 18 triangles, 3 squares, 4 rectangles
4. No of square corners = 8; Less than square corner = 14 d. 5. a.
More than square corner = 2
5. Curved surface = 3; Plane surfaces = 7;
Cone, cylinder, cuboid, cube, prism Mental Maths
Mental Maths i
1. a 2. b 3. a 4. a Chapter 9: Measurement of Length
Hots Warm Up
1. a. 10 b. 3 2. 5 1. ruler 2. metre rod 3. measuring tape 4. odometer
Model Test Paper 1 Exercise 9A
1. d 2. b 3. a 4. c 5. b 6. b 1. a. cm b. cm c. cm d. cm
7. c 8. c 9. b 10. b e. cm f. cm g. cm h. cm
11. a. T b. F c. F d. T e. T i. m j. km
12. a. 4420, 4520 b. 5530, 5430 2. a. 14 cm b. 10 cm c. 12 cm d. 11 cm
13. a. 100 b. 0 c. 134 d. 0 e. 3639 f. 0 e. 9 cm
g. 150 h. 38 i. 100 3. a. Route I b. 5 m c. 8 m d. 8 m
14. a. 2997 b. 7540, 4057 Exercise 9B
15. a. 9025 b. 4338 c. 5168 d. Q = 101, R = 1 1. a. 400 cm b. 1400 cm c. 2600 cm d. 510 cm
17. a. 20 b. 7 c. 8 e. 9508 cm f. 1218 cm g. 4575 cm
18. a. 3 b. 5 2. a. 5000 m b. 6000 m c. 9000 m d. 4300 m
8 16 e. 2500 m f. 6015 m g. 1425 m
19. a. Cube b. Cuboid, 12 c. Cone d. Sphere e. Cylinder Learning Logs
20. 3117 1. a. 100 b. 1000 c. 1 d. 1
21. Square More than square Less than square 2. a. 800 cm b. 4600 cm c. 1205 cm d. 3885 cm
a. 2 1 1 3. a. 7209 m b. 3486 m c. 4876 m d. 3911 m
b. 0 6 0 4. a. Home to shopping mall via temple b. 4 km
Chapter 8: Symmetry and Patterns Mental Maths 2. b 3. b 4. a 5. a
1. c
Exercise 8A Hots
1. c, d, e, g and h 4 blocks, 40 cm
2. a. b. c. d.
Chapter 10: Measurement of Weight
Warm Up
1. Rajeev 2. Sujoy 3. Puneet
e. f. g. h. 4. Rachna, Geeta, Varun, Arun/Rajeev, Ajay, Sujoy, Puneet
5. Arun and Rajeev

222 Mathematics 3