Page 304 - Start Up Mathematics_6

Chapter 10 Chapter 11
Exercise 10.1 Exercise 11.1
1. (a) 52 cm (b) 72 cm (c) 40 cm 1. Number of chocolates; 5n 2. Number of horses; 4n
2. 40 m 3. 64 cm 4. 3 km 3. Number of chicks; 2n 2
5. perimeter will increase by twice of original length 4. Squares of natural numbers; n
6. 13 cm 7. 65 m 40 cm 5. S. No. Value of the term
8. 11 km, ` 99,000 1. 100
9. Smita walks 60 m more than Ranjan 2. 62
10. ` 1,54,875 11. l = 20 m, b = 5 m 3. 149
Exercise 10.2 4. 555
1. 400 m 2. 1,296 cm 3. 91 m 5. 895
2
2
4. 16 m, perimeter of rectangle = 104 m, perimeter of 6. Number of
square = 96 m quadrilaterals 4 5 10 ... n
5. 22.14 m ; ` 7,195.5 6. ` 16,200 Number of
2
7. ` 4,040; ` 11,706.66 8. Area becomes 4 times matchsticks 17 21 41 ... 4n + 1
9. 506.25 m 10. (a) 480 tiles (b) 64 tiles 11. 31 m 2
2
Review Exercises 7. Number of
Multiple Choice Questions quadrilaterals 4 5 10 ... n
1. a 2. d 3. d 4. c Number of
5. a 6. b 7. c 8. c matchsticks 18 22 42 ... 4n + 2
Solve Mentally Riddles
True or False (a) 1 (b) 18
1. True 2. True 3. False Exercise 11.2
4. True 5. True 6. False 1. 10 l
Fill in the Blanks 2. The answers can vary. Four of the expressions are:
1. square units; units 2. p cm 3. regular 4. 837 9 + 7 × 4, 9 – 7 + 4, 4 – 7 × 9, 7 – 4 + 9
2
2
Answer in One Word or a Line 3. (b) and (c)
1. 50 cm 2. cm 2 3. m; 4 (length of side) 4. (a) addition; adding 4 to x
4. 2,000 m 5. 1,000 × 1,000 (b) multiplication and subtraction; subtracting 3 from 7
times x.
Let’s Evaluate (c) multiplication and subtraction; subtracting 11 from
1. 16 cm 2. 125 m 3. Area becomes one-fourth twice of y
4. 6,000 m 5. Area is doubled (d) addition and multiplication; adding 11 to 3 times y.
6. 7.2 km; ` 79,200 7. 729 m 2 p
2
8. 24.99 m ; ` 14,994 9. ` 70,400 5. (a) 5x (b) –p – 2 (c) –6q (d) 4
Thinking Skills (e) 2x + 56 (f) –3y + 18 (g) 8x – 16
1. A lies completely in B 6. length = 3b, perimeter = 8b
2. 13 sq. unit 7. (6x + 100) km
2
3. 2,204 m 8. (a) In a class, boys are 3 times the girls.
4. (a) not possible (b) possible (b) Cost of car is 12 times that of bike.
Values and Life Skills (c) Ravi’s father is 5 times his age and Ravi’s mother is
1. 210 m 2. 8,000 bricks 4 years less than 5 times his age.
Exemplar Problems (d) In a contingent the number of soldiers in each row
are twice that of the total number of rows.
1. d 2. b 3. d 4. False (e) Each row contains 2 more chocolates than the number
5. True 6. 2 cm 7. 44 units 8. 20; 20 m of rows.
9. 1,340 m; ` 26,800; ` 4,00,000 10. ` 5,400 9. length = (4h) cm, breadth = (4h – 6) cm

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