Page 306 - Start Up Mathematics_6

Exercise 12.3 Chapter 13
1. ` 73.5 2. ` 180 3. 55 kg Exercise 13.1
4. 640.5 mm 5. ` 37.5 6. Shubham 7. 25 L 1. (b) and (d)
8. 5,950 km 9. ` 1,350 10. 300 L 11. 6,480 m

Review Exercises
Multiple Choice Questions 2. (a) (b) (c)
1. a 2. d 3. a 4. c 5. c
6. a 7. d
Solve Mentally
True or False (d) (e) (f)
1. False 2. False 3. True 4. False 5. True
Fill in the Blanks
1. antecedent 2. extremes 3. zero 4. means
5. a and b are equal 3.
Answer in One Word or a Line F and J are not symmetrical.
1. 1 : 1
2. Yes, when they represent same part of the whole which 4. (a) m (b) l (c) k, m (d) l, n (e) l (f) l
varies or represent different quantities. 5. (a) (b) (c)
3. No
4. Four numbers are in proportion if the ratio of first two is
equal to the ratio of the last two.
5. The ratio changes
6. antecedent, consequent
Let’s Evaluate (d) (e) (f)
1. 5 2. 80 3. 5 : 13 4. 24 m 5. Anup
6. ` 180, ` 720, ` 900 7. 480 girls, 640 boys
8. (a) 2 : 3 (b) 3 : 2 (c) 2 : 5 (d) 3 : 5
9. (a) 6 : 5 (b) 5 : 1 (c) 1 : 6 (d) 6 : 1

Thinking Skills Exercise 13.2
1. q = r if p ≠ 0 2. 1 : 5 3. not necessarily 1. (a) 1 (b) 0 (c) 1 (d) 4 (e) 4 (f) 1
4. 39 pens
5. Ashraf = ` 360, Bholanath = ` 540, Chameli = ` 900
6. 1.5 kg 2. (a) (b) no line of symmetry
7. Girls in VI B = 27, number of girls in VI A cannot be
determined (insufficient data)
8. 6 days
Values and Life Skills (c) (d)
1
1. 13 m 2. ` 384 3. 10 days
3
Exemplar Problems 3. (a) Only vertical line of symmetry: A, M, T, U, V, W, Y
1. d 2. d 3. False 4. 100 paise or ` 1 (b) Only horizontal line of symmetry: B, C, D, E, K
5. 149 : 160 6. (a) 5 : 9 (b) 3 : 10 (c) Both vertical and horizontal lines: H, I, O, X
(d) No line of symmetry: F, G, J, L, N, P, Q, R, S, Z
7. 54 kg ; 30 kg 8. 30° 9. ` 51
Exercise 13.3
Crossword Puzzle 1. (a) 6 (b) 5 (c) 1 (d) 1 (e) 1
Across: 3. Unitary 5. Antecedent 6. Continued Answer can be checked by mirror image or by paper
Down: 1. Proportion 2. Consequent 4. Ratio folding.

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