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\ 06-Jan-2025 Surender Singh Routhan Proof-2 Reader’s Sign _______________________ Date __________

7. Chapter Assessment
A. 1. (a) 2. (b) 3. (b) 4. (a) 5. (b)
6. (b) 7. (a) 8. (a) 9. (c) 10. (c)
B. 1. (a) 2. (b) 3. (a) 4. (d)
C. 1. x 2. II, IV 3. III 4. (7, 5) 5. x-axis
D. 1. True 2. False 3. True 4. False 5. False
6. True 7. False 8. False
E. 1. (a) Straight line (b) Parallelogram
2. (a) Yes (b) Yes 3. (8, 5)
4. A(3, 2); B(6, 2); C(5, 1); D(2, 1)
7. (a) On the x-axis time taken to cover the distance is shown and on the
y-axis distance in kilometre is shown.
(b) From city P at 8 a.m. (c) 50 km
(d) (i) 100 km (ii) 50 km
(e) No, the speed of the car is different for 1st, 2nd and 3rd hours. It is
50 km/hr, 100 km/hr and 50 km/hr respectively.
(f) Yes, 11 a.m.–12 noon. (g) 2 p.m.
8. (a) On the x-axis, the number of matches played and on the y-axis runs
(i) Yes (ii) (–1, –2) scored by batsman A and B is shown.
8. The coordinates of the vertices of rectangle are: (0,0), (5,0) , (5,3), and (b) Green line (c) Yes, In 4th match
(0,3). (d) Since batsman B scored almost the same number of runs in every
Think and Answer match and fluctuations is also less as compared to batsman A. So
Quantity is the independent variable and cost is the dependent variable. batsman B is more steadier.
Quick Check 9. (a) 39°C (b) 12 noon (c) 9 a.m.–10 a.m.
(d) 7 a.m.–8 a.m.
1. 100 km 2. (3, 150)
Mental Maths
Practice Time 14B
1. (0, 0) 2. –5 3. 7 4. 0
1. (a) `24 (b) 8 pens
2. Yes, the graph pass through the origin. 5. y-axis
(a) `200 (b) `3500 (c) `7000 6. (a) Ist quadrant (b) IIIrd quadrant (c) x-axis
4. (a) 270 km (b) 75 km/hr (d) IInd quadrant (e) y-axis (f) Origin
(g) IVth quadrant
6.
7. (a) The car is moving at a uniform speed as the distance increases
uniformly with time.
(b) The car moves at a uniform speed initially and then comes to rest
position.
8. A(0, 2); B(1, 0); C(2, 1); D(2, 3); E(3, 1); F(4, 0)
Chapter 15: Playing with Numbers

Let’s Recall
1. 1000 + 200 + 30 + 4
2. (2, 3); (2, 13); (3, 17); (3, 7); (13, 17)
3. (a) (ii) (b) (iii)
4. (a) False (b) True (c) False (d) True
5. (a) 8656 (b) 8800 (c) 9168 (d) 10128
Quick Check
1. (a) 5 × 10 + 5 (b) 7 × 10 + 0 (c) 1 × 100 + 2 × 10 + 1
(d) 9 × 100 + 9 × 10 + 9
2. (a) 87 (b) 777 (c) 908
Quick Check
th
7. (a) 3rd and 9th year (b) 14% (c) 6 year A = 0; B = 4
(d) 2nd Year (e) 3rd and 9th year, 1st and 10th year. Practice Time 15A
8. (a) Class IV (b) In Class V, students A and B both scored 80 marks. 1. (a) 3 × 10 + 6 (b) 4 × 100 + 0 × 10 + 5
(c) The minimum marks scored by student B is 60 in class III, VI and IX. (c) 1 × 1000 + 2 × 100 + 1 × 10 + 1 (d) 6 × 1000 + 5 × 100 + 0 × 10 + 0
(d) Clas IV and V (e) 40 marks downfall. 2. (a) 65 (b) 708 (c) 99
Brain Sizzlers (d) 1000a + 100d + 10b + c
1. 40 km 2. 1.5 hours 3. 16 km/hr 3. 2664; Yes; Yes 4. 48 5. 52

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