Page 271 - MathGPT_V1.0_C4

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\ 02-Nov-2023 Bharat Arora P-1 Reader’s Sign _______________________ Date __________

Practice Time 7C Practice Time 8B
1. (a) 0.4 (b) 3.7 (c) 0.09 (d) 0.48 (e) 0.98 (f) 1.96 1. (a) Intersecting lines (b) Parallel lines (c) Perpendicular
(g) 2.13 (h) 1.4 (i) 23.5 (j) 8.07 (d) Intersecting (e) Intersecting (f) Perpendicular

6 35 2 1 9 2. (a) Arms: OA , OB ; Vertex: O; Angle: ∠AOB

2. (a) (b) (c) 1 (d) 5 (e) 3

10 100 10 10 10 (b) Arms: BA , BC ; Vertex: B; Angle: ∠ABC

(c) Arms: QP , QR ; Vertex: Q; Angle: ∠PQR
45 3 2 63 4
(f) 3 (g) 9 (h) 27 (i) 26 (j) 28 Practice Time 8C
100 100 10 100 100
2. (b), (c), (e), (f), (h) 3. (a), (b), (c), (e)
Chapter Assessment 4. (a) AB , BC , CD , DA (b) XY , YZ , ZX
1. (a) (iii) (b) (iv) (c) (ii) (d) (ii) (e) (ii) (c) MN , NO , OP , PM (d) AB , BC , CD , DE , EA
2. (a) (iv) (b) (iii) (c) (ii) (d) (i) 5. (a) T (b) F (c) F (d) T (e) F
3. (a) Three hundredths (b) 6 tenths (c) 3 tenths (d) 9 hundreds Practice Time 8D
4. (a) 65.28 (b) 84.79 (c) 309.05 1. (a) False (b) True (c) True (d) False (e) True (f) True
5. The fifth swimmer E 6. Decimal: 0.5, fraction: 5 2. (a) Centre: O, Radius: OA, OB, OC, Diameter: BC 3. (a) OA (b) AB
(b) Centre: O, Radius: OA, OB, Diameter: AB
7. Smallest: 12.42, largest: 42.12 8. 10 cm 10 5. (a) 20 cm (b) 26 cm (c) 18 cm (d) 10 cm (e) 14 m
Mental Maths 6. (a) 6 cm (b) 20 cm (c) 13 cm (d) 32 cm (e) 40 cm
5 2 3 Practice Time 8E
1. (a) 10 (b) (i) , 0.5 (ii) , 0.2 (iii) , 0.3
10 10 10 1. Number Number Number Number
Name of of of plane of curved of Number of
2. Ones . Tenths Hundredths Decimals shape face(s) face(s) face(s) edge(s) vertices
(a) 0 . 9 0.9 (a) Cube 6 6 0 12 8
(b) 5 . 7 6 5.76 (b) Cuboid 6 6 0 12 8
(c) 1 . 0 4 1.04 (c) Cylinder 3 2 1 2 0
(d) 5 . 4 7 5.47 (d) Cone 2 1 1 1 1
Brain Sizzlers (e) Sphere 1 0 1 0 0
29.47 (f) Hemisphere 2 1 1 1 0
2. (a) Football, Globe (b) Rubik cube, Dice (Answers may vary)
Model Test Paper – 1 3. (b), (c)
A. 1. (a) 2. (c) 3. (a) 4. (c) 5. (b) 6. (c) Practice Time 8F
7. (c) 8. (a) 9. (d) 2. (a) (i) Front view (ii) Top view (iii) Side view
B. 1. 4,00,000 + 10,000 + 3000 + 600 + 30 + 2 2. 1,00,000 (b) (i) Front view (ii) Side view (iii) Top view
3. 13 4. zero(0) 5. 6 6. 1 (c) (i) Side view (ii) Front view (iii) Top view
7. 200 + 10 + 5 + 0.7 + 0.05 Chapter Assessment
(e) (ii)
C. 1. 7 necklaces 2. 5 or 1 3. 12,04,700 1. (a) (iv) (b) (iv) (c) (iv) (d) (iii) (f) (ii)

10 2 2. (a) A, B, O, D, E (b) BF (c) OA , OB , OD , OF (d) OE
4. 45 chairs in each row, 57 chairs left. 5. 3950 kilometers 3. (a) AD (b) AB and CD (c) parallel (d) AC and BD
6. (a) (b) (c) 4. E, M, W
63 48 36
5. (a) Three (b) centre : O, Diameter: AB, Radii: OA and OB
(c) 14 cm
3 × 21 2 × 24 2 × 18
6. Radius 8 cm 9 cm 2 cm 5 cm 4 cm
3 × 7 3 × 8 2 × 9 Diameter 16 cm 18 cm 4 cm 10 cm 8 cm
7. (c)
2 × 4 3 × 3 8. (a) (i) Plan or Top view (ii) Front view (iii) Side view
(b) (i) Side view (ii) Plan or Top view (iii) Front view
2 × 2 Brain Sizzlers
1 2 3 4 5 6 7 1. 8 cm 2. 16 cm
7. = = = = = = Mental Maths
3 6 9 12 15 18 21 1.
Chapter 8. Geometry No 2. Yes 3. No 4. Three 5. No
Chapter 9. Symmetry and Patterns
Let's Recall
1. (a) cone (b) cuboid (c) circle Let's Recall
Practice Time 8A 1. (a), (b) 2. (a) (b) 100000
1. (a) point (b) definite (c) one (d) no Think and Answer

2. (a) Point P (b) Line ST (c) Ray DC (d) Line segment UV yes; 0, 3 and 8

3. (a) , OB OC OD Practice Time 9A
,
,
OA

,
,
(b) , OB OC OD OE OF OG OH 1. (a), (e), (f)
,
,
,
,
OA

,
,
(c) PA PB PH PG DF CE 2. (a) (b) (c) (d)
,
,
,

4. (a) P, Q, R (b) PQ PR, (c) QX , QY , PX (d) PR
Think and Answer
Railway tracks, Edges of a ruler, Zebra crossing, Ruled paper, etc. 3. (a), (c)
Think and Answer Practice Time 9B
Partially open doors, scissors, hands of clock, cycle spokes, etc. 1. (b), (d), (e), (f)
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