Page 227 - Start Up Mathematics_5

Values and Life Skills 5. 25% 6. 24% 7. Meena 8. 40%
1. 450 pages 2. 13
Values and Life Skills
Scratch Your Brain 1. 10% 2. 24%
1. ` 1.75 2. Profit = ` 65 Scratch Your Brain

3. 1 × C.P. 4. ` 1,200 profit
3 1. 10% 2. ` 468.75
Chapter 11: Percentage 3. (a) 1,050 g (b) 1,040 mL (c) 270 cm
(d) 1,140 L (e) 13,272 p (f) ` 3.10
Exercise 11.1
(g) 1,76,000 mg (h) 769.5 mm (i) 57,600 m
Q. 1 and 2 to be done by students on their own.
3. (a) 3 (b) 8 or 2 (c) 11 (j) 2,250 g
100 100 25 100

(d) 15 or 3 (e) 36 or 9 (f) 44 Assessment Sheet 3
100 20 100 25 100 I. Choose the correct answer.
(g) 52 or 13 (h) 67 (i) 79 1. (c) 2. (a) 3. (d) 4. (b) 5. (a)
100 25 100 100 6. (c) 7. (d) 8. (b)
(j) 82 or 41 (k) 90 or 9 (l) 68 or 17
100 50 100 10 100 25 II. Solve mentally and answer.
4. (a) 0.05 (b) 0.07 (c) 0.13 (d) 0.18 1. 87 km 827 m 2. 43 hg 71 g 3. False
(e) 0.28 (f) 0.35 (g) 0.48 (h) 0.51
4. 40°C 5. ` 521.52 6. ` 702.65 7. ` 945
(i) 0.64 (j) 2.70 (k) 1.85 (l) 3.20 11
8. 9. 45% 10. 1,200 g
5. (a) 10% (b) 40% (c) 62.5% (d) 56% 20
(e) 90% (f) 82% (g) 37.5% (h) 185%
Chapter 12: Lines, Angles and Triangles
(i) 40% (j) 90% (k) 23.6% (l) 68.75%
Let’s Recall
6. (a) 60% (b) 15% (c) 24% (d) 1%
1. (a) line segment (b) line (c) ray (d) line
(e) 8% (f) 38% (g) 2.6% (h) 18.4%
(e) ray (f) line segment
(i) 306.2% (j) 1,598% (k) 2,513% (l) 5,825% 2. Students to do on their own.
3. (a) acute (b) acute (c) acute (d) right
Exercise 11.2
(e) straight (f) obtuse
1. (a) 6.2 (b) 31.9 (c) 65.28 (d) 46.92
Exercise 12.1
(e) 283.72 (f) 148.92
Q. 1 and 2 to be done by students on their own.
2. (a) 196 g (b) 75.25 m (c) 61.5 cm
(d) 0.3L or 300 mL (e) 362.5 g Exercise 12.2
(f) ` 2,336.80 1. Students to do on their own.
3. 25% 4. 37.7% 5. 38.7% 6. 135 days 2. (a) (iii) (b) (i) (c) (ii) (d) (i) and (ii)
(e) (ii)
Let’s Evaluate
Exercise 12.3
1. (a) 75% (b) 41.6% (c) 26% (d) 94%
1. (a) acute-angled triangle (b) right-angled triangle
(e) 112.5% (f) 204.3%
2. (a) 74 or 37 (b) 126 or 63 (c) 315 or 63 (c) equilateral triangle (d) isosceles triangle
100 50 100 50 100 20 (e) obtuse-angled triangle (f) scalene triangle
5
(d) 92 or 23 (e) 125 or (f) 3 2. (a) Yes (b) No (c) Yes (d) No (e) No (f) No
100 25 100 4 100 3. (a) Yes (b) Yes (c) No (d) No (e) Yes (f) Yes
3. (a) 0.92 (b) 0.63 (c) 1.79 (d) 0.07 (e) 0.56
(f) 2.89 Let’s Evaluate
4. 25% of ` 380 is bigger by ` 11. Q. 1 and 2 to be done by students on their own.

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