Page 231 - Math Genius C3

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3. (b) 12 ÷ 3 = 4 (c) 15 ÷ 3 = 5 (d) 6 ÷ 3 = 2 3 4
1 1 1 16. (a) (b)
of 12 = 4 of 15 = 5 of 6 = 2 7 7
3 3 3 17. 126
4. (b) 12 ÷ 4 = 3 (c) 16 ÷ 4 = 4 (d) 8 ÷ 4 = 2 18. Smallest = 3078 ; Greatest = 8730 ; Difference = 5652
1 1 1 19. 2030
of 12 = 3 of 16 = 4 of 8 = 2
4 4 4 Chapter 7. Geometry
5. (a) 18 (b) 21 (c) 13 (d) 20 (e) 17 (f) 18
6. (a) `48, `40, `15, `103 (b) `24, `60, `20, `104 Let’s ReCaLL
think tank (Page 113) 1. (a) Square or diamond, Two-way traffic (b) Circle, No entry
Kareem = 6 Marbles, Kavita = 10 Marbles, Anuj = 14 Marbles (c) Triangle, Left-hand curve
(d) Rectangle, Electric vehicle charging station
Practice time 6C Fast Check (Page 121)
1. 10, 7, 3, 3 2. 16, 9, 9 3. 17 1. Straight path 2. Line segment
10 16 32
4. (a) 9 (b) 6 5. (a) `60 (b) `30 Practice time 7a

1 1 1 1. (b) Line AB, AB (c) Line MN, MN (d) Ray PQ, PQ
6. (a) (b) (c)
3 3 3 2. (a) 4;AB, BC, CD, DA (b) 3; PQ, QR, PR
(c) 5; GH, HI, IJ, JK, KG (d) 6; EF, FG, GH, HI, IJ, JE
Mental Maths (Page 114) 3. 4; AE; BF, CG, DH
2 1 6 21 4. (a) Ray (b) 6 (c) 1
1. 2. 3. 4.
11 7 10 26 think tank (Page 123)
5. (a) 6 (b) 15 (c) 4 (d) 4
Yes
Chapter assessment Practice time 7C
1. (a) (iii) (b) (i)
1. (a) Circle (b) Triangle (c) Rectangle (d) Square
2. (a) 2 (b) 1 (c) 3 2. (a) 8 (b) 13 (c) 14
5 4 20 3. (a) 3 (b) 3 (c) 7
3. (a) 8 (b) 30 (c) 21 (d) 22 4. (a) Square (b) Rectangle (c) Circle (d) Triangle
4. (a) 4 (b) 3 (c) 2 (d) 5 5. (a) rectangle (b) triangle (c) circle (d) square
4 1
5. 6. 7. Riya = 9, Joe = 12 6. (a) T (b) T (c) F (d) F
12 3 Maths Fun (Page 127)
4 3 7 5 8
8. (a) (b) (c) (d) (e) 1. 14 2. 15
10 10 10 10 10
Challenge Question (Page 116) Fast Check (Page 129)
1. Cuboid 2. Sphere 3. Cone 4. Cylinder
Brand Input Drained Water Fresh Water Practice time 7D
A 20 L 10 L 10 L 1. (a) Circle (b) Rectangle (c) Square (d) Triangle
B 24 L 8 L 16 L 2. (a) Yes (b) No (c) No (d) Yes
(e) No (f) Yes
C 36 L 9 L 27 L
3. shape Number of faces Number Number
Model test Paper – 1 of Plane Curved of edges of
1. (b) 2. (b) 3. (c) 4. (c) Objects faces faces vertices
5. (b) 6. (a) 7. (b) 8. (b) Cube 6 0 12 8
9. (b) 10. (c) Cuboid 6 0 12 8
11. (a) addition (b) 999 (c) dividend (d) 448 Cone 1 1 1 1
(e) 9899 (f) dividend
12. (a) Ascending order = 2397 < 3267 < 6501 < 8709 Cylinder 2 1 2 0
Descending order = 8709 > 6501 > 3267 > 2397 4. (a) Top view (b) Side view (c) Front view
(b) Ascending order = 3076 < 4093 < 7804 < 9712 Practice time 7e
Descending order = 9712 > 7804 > 4093 > 3076 1. (a) West (b) North (c) East (d) West
13. (a) (iv) (b) (iii) (c) (i) (d) (ii) Challenge Question (Page 132)
14. 2728 = 2 Thousands + 7 Hundreds + 2 Tens + 8 Ones 1. 18
+ 111 = 0 Thousands + 1 Hundred + 1 Ten + 1 one Mental Maths (Page 133)
2839 = 2 Thousands + 8 Hundreds + 3 Tens + 9 Ones 2. 3 3. Sphere 4. 4
Chapter assessment
15. 17 – 7 = 10
1. (a) (i) (b) (ii) (c) (i)
– – – 2. (a) 5, 1, 2 (b) 18, 3, 1
6 – 3 = 3 3. Water bottles, Dry cell
4. Ice-cream cone, Birthday cap
= = =
6. (a) Cone (b) Cylinder (c) Cuboid (d) Sphere
11 – 4 = 7 (e) Cube

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