Page 350 - Start Up Mathematics_7

Review Exercises Exemplar Problems
Multiple Choice Questions 1. b 2. a 3. c 4. 5, 8, 5

1. b 2. c 3. a 4. d 5. a 6. c 7. c 5. triangular prism 6. False
8. a 9. a 10. c 11. d 7. x
Solve Mentally x x x
True or False 2x 2x 2x 2x 2x
1. True 2. False 3. True 4. False 5. False x x x
x
6. True 7. False 8. False 9. True 10. True
Fill in the Blanks Chapter 16
1. polygon, triangles 2. edge 3. vertex 4. prism Exercise 16.1
5. sphere 6. tetrahedron 7. 30 1. (a) 20 marks (b) 37 marks (c) 36 marks (d) 34 marks

8. hexagonal pyramid 9. sphere 10. 6 2. (a) 20.5 mm (b) 6.5 mm (c) 3 days
Answer in One Word or a Line 3. (a) 40 (b) 39 and 44; Yes
1. Cone 2. Cylinder 3. Tetrahedron 4. (a) Time (x ) Frequency (f )
i
i
10 2
4. Yes 5. 12
6. A net is a skeleton outline of a solid that can be folded 13 2
to make it. 19 4
7. In an isometric sketch the sides are proportional to their 20 1
actual length which is not the case in oblique sketch. 25 1
8. No 9. No, not necessarily 26 6
Let’s Evaluate 28 1
30 1

1. (a), (c) and (e) 2. (a) (b) 31 2
(b) longest: 31 min; shortest: 10 min; range = 21 min
(c) mean = 22.15, median = 22.5, mode = 26
3. (a) 46 (b) 29 (c) 17 (d) mean
Exercise 16.2
(d) 1 (e) 1. (a) Favourite sport of students (b) cricket

(c) Athletics and badminton
2. (a) March (b) February (c) 30
4. (a) (iii) ; (b) (iv) ; (c) (i) ; (d) (v) ; (e) (ii)
3. (a) Gaurav (b) Priti and Sarika
Thinking Skills (c) Yes, Sarika has lost the maximum marks. Priti has lost
1. If, F = faces, V = vertices, E = edges of a polyhedron, the maximum percentage of marks.
then F + V = E + 2 4. (a) latest mobile phone
For an icosahedron, number of edges n is
n = F + V – 2 = 20 + 12 – 2 = 30 (b) admission in professional college
2. Fig. 1—Circle, Fig. 2—Oval. In case of a cone the cross- (c) admission in professional college
section is a circle and ellipse respectively. (d) none (e) latest mobile phone
Top view Review Exercises
Multiple Choice Questions

3. 1. b 2. c 3. b 4. d 5. a
Side view 6. d 7. d 8. c 9. a 10. c
Front view 11. d 12. c

342