Page 386 - Start Up Mathematics_8 (Non CCE)

Since the numbers of bananas and apples are necessarily whole 5 3
numbers, their respective values are 2 and 4. 8. 15 % of tin and 84 % of copper
8 8
Review Exercises 9. 80 10. 78,650
Multiple Choice Questions 11. 10% like grape juice, 1,500 like orange juice, 750 likes
1. c 2. d 3. c 4. a 5. b mango juice and 250 likes grape juice.
12. 500 13. ` 900 14. 8.7% 15. ` 1,500
Solve Mentally 16. 17.65%
True or False Problems Related to Thinking Skills

1. False 2. True 3. False 4. True 1. The required distance is four-fifths of the total distance,
Fill in the Blanks 4
2 i.e., × 1,00,000 km = 80,000 km
1. directly 2. n 3. 39 4. 4 days 5
7
2. The amount of apple juice in the can of orange juice will
Answer in One Word or a Line be exactly equal to that of orange juice in the can of apple
1 juice.
1. No 2. 3. 16 hours
2 Review Exercises
Let’s Evaluate
Multiple Choice Questions
3 3 1. b 2. d 3. b 4. c
1. (a) 3 h (b) 48 h 2. 9 days, Manoj
7 13 5. a 6. d
7 Solve Mentally
3. 5 days 4. ` 840 5. 6 days
13 Fill in the Blanks
6. 12 h 1. fraction, multiply 2. 30 3. 2,800 4. 87 5. 300
Thinking Skills Answer in One Word or a Line
1. 9 days 2. 1.5 days 1. To find the percentage of a number, let the number be x
3. A – 24 days, B – 40 days and C – 30 days 4. 8 min and the desired percent be p%. Multiply x by p and divide
by 100 to obtain the desired p% of x.
Values and Life Skills 2 3

3 2. 8% 3. ` 37 4. 60% 5. 18 %
1. 12 days 2. 90 h 3 4
5 Let’s Evaluate
Chapter 11 1. (a) 0.5% (b) 81.25% (c) 168.75%
Exercise 11.1 2. (a) 1 or 1 : 250 (b) 7 or 7 : 200
1. (a) 24% (b) 37.5% (c) 40% (d) 9.6% 250 200
(e) 8% (f) 625% (g) 26.67% (h) 16% 28
(i) 28% (j) 2.88% (c) 25 or 28 : 25
3 1 3. (a) 1,200 (b) 1,200 4. 1,100 sheeps
2. (a) or 3 : 10 (b) or 1 : 400
10 400 5. ` 4,000
5 1 Thinking Skills
(c) or 5 : 2 (d) or 1 : 20,000
2 20,000 1. 1 kg 7 hg 5 dag 8 g 2. 27%
13 1
(e) or 13 : 20 3. 33.3% or 33 % 4. ` 10,000
20 3
3. (a) 0.36 (b) 0.075 (c) 0.0015 (d) 0.1225 Values and Life Skills
(e) 0.00167
1. ` 5. 2. ` 9,000
Exercise 11.2 3. Absolute alcohol = 22.92 mL
1. (a) 26.4 (b) ` 31.25 (c) 420 g (d) 250 mL Mentha oil = 0.87 mL
2. (a) 40% (b) 10% (c) 130% (d) 600% Spearmint oil = 0.306 mL
3. (a) 700 (b) 350 (c) 200 (d) 9,000 Chloroform = 0.075 mL
5
4. b = 9,600, c = 40,000 5. 80% 6. ` 45.45/kg 4. 89,000 5. 250 days 6. 10.71% or 10 %
7. (a) 24 runs (b) 36 runs (c) 30 runs (d) 30 runs 7
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