Page 387 - Start Up Mathematics_8 (Non CCE)

Exemplar Problems Thinking Skills
1. b 2. c 3. equal, denominator 1. ` 5,900 2. ` 4,500, 7.143% 3. ` 300
4. 300% 5. False 4. 47%
2 Values and Life Skills
6. (a) 40% (b) 10 % (c) 20% 1. Profit 10% 2. ` 500
3
7. 7,00,000
3. (a) ` 247 (b) ` 96.73 per litre (c) ` 2.85 (d) ` 829.64
Chapter 12 4. S.P. = ` 540; C.P. = ` 600
Exercise 12.1 5. ` 5,800
1. 21.42% 2. 2.91% 3. ` 200, 28.57% Exemplar Problems
4. 20% 5. 14.28% 6. 12.78% 1. c 2. ` 406 3. True
7. (a) ` 16 (b) ` 12.80 8. 2.04% 4. (a) ` 30.60 (b) ` 59.40 5. ` 380
9. 1% loss 10. ` 21,200 11. ` 68 6. Profit 27.08%
12. ` 880, 12.50% 13. 20%
14. C.P. of 1st fan = ` 1,200, C.P. of 2nd fan = ` 1,920 Chapter 13
6 Exercise 13.1
15. (a) ` 600 (b) ` 624, ` 630 16. 14 % 1. ` 1,780.80 2. ` 278.18 3. ` 21,224.16
25
Exercise 12.2 4. ` 989.19 5. ` 259.20 6. ` 9,288.18
1. (a) ` 280 (b) ` 891 2. (a) ` 2,000 (b) ` 1,200 Exercise 13.2
3. (a) 6% (b) 20% 4. 25% 5. ` 2,880 1. (a) ` 764.06 (b) ` 646.52 (c) ` 4,310.13
2. ` 10,125 3. ` 19.33 4. ` 50.00
6. ` 800 7. 20% 8. ` 3,808.80 5. ` 5,846.01 6. ` 45.45 7. ` 918.12

9. 800 with 20% discount, by ` 6.40 8. ` 8 9. ` 1.22
10. Profit of 8% 11. ` 23,040 Exercise 13.3
Exercise 12.3 1. 3 years 2. 20% p.a. 3. ` 6,250 4. ` 7,680
1. ` 364 2. ` 4,000 3. ` 264 4. ` 30,000 5. 5% 5. ` 6,400 6. 4% p.a. 7. ` 1,261 8. 8% p.a.
9. ` 7,806.54 10. 41.4% p.a.
6. ` 6,451.20 7. ` 512 8. ` 2,502.90 11. 8%

¸ Ô
Review Exercises Ï Ô Ê 1+ R ˆ 2 - 1˝ - PRT
Multiple Choice Questions (Hint: C.I. – S.I. = P Ì Á Ë Ô Ó 100 ¯ ˜ Ô ˛ 100
1. a 2. c 3. d 4. b Ê R 2 R ˆ PR
+
5. c 6. d = P Á Ë 10,000 100¯ ˜ - 50 )
Solve Mentally
True or False 12. 1½ years 13. ` 64,000 14. 12½ years
1. False 2. True 3. True Exercise 13.4
4. False 5. False 1. 5,618 (approx.) 2. 5,237 (approx.) 3. 3,50,000
Fill in the Blanks 4. 5% per year 5. 11,136 years 6. 20,000
1. S.P., C.P., profit 2. rebate 3. C.P. 4. ` 234 Exercise 13.5
5. 6% 1. (a) ` 1,44,400 (b) ` 1,37,180 2. ` 4,97,028.34
Answer in One Word or a Line 3. ` 7,257.60/kg 4. 3 years 5. 20% p.a.
1. The expenses incurred in packing, cartage, taxes, labour
charges, etc. are called overhead expenses. Review Exercises
2. The net selling price is calculated by first deducting the Multiple Choice Questions
discount and then adding the tax to the S.P. 1. b 2. c 3. b 4. d 5. a
3. ` 840 4. 2.5%
Let’s Evaluate Solve Mentally
1. 11.76% 2. 5 kg 3. ` 1,26,000 Fill in the Blanks
4. I television for ` 17,500, II television for ` 12,500 1. Compounding, simple 2. relative
5. 17.92% 6. ` 6,504.70 7. ` 2,695.60 3. usage, wear
8. Successive discounts and by ` 15 4. ` 1,463.42

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