Page 83 - steps 4b 02.pdf

• Answers 4b • • • • • • • • • • • • • • • • • 2

ORM 11 2
2 multiple squares with cross % squares with cross
2 50 50%
4 25 25%
8 12 12%
3 The percentage for 4 is half that for 2.
ORM 16
4 The percentage for 4 is just over double that tor 8. 1 non-regular pentagon 2 obtuse-angled triangle
5 multiple squares with cross % squares with cross 3 non-regular hexagon 4 trapezium
2 50 50%
5 parallelogram 6 isosceles triangle
3 33 33%
6 16 16% ORM 17
2a $
6 The percentage for 2 is 50% or half of the grid, for 3 is
33% or a third of the grid, for 6 is 16% or approximately b ~ e ~
a sixth of the grid.

ORM 12
1 The ball rises 12.8 m. 2 After the 7th bounce
3 The ball rises 64.8 m. 4 After the 13th bounce
ORM 13
4 5 shapes from 2 plus a further q shapes = 14 shapes
1 a 334 b 760 c 607
2 a 586 b 0q0 c 55q
3 a n2 b 784 c q 1 q d q36
4 Open 5 ti' a, b, c
ORM 18
2

d
29qq 31oq
1420 14H [1630]
@D 576 qo3 @D 4 Open
2 The 6 possible top brick numbers are: ORM 1q
836, J 58, 472, 1oq ----- 3435 1 a 12, 18, 23, 30; rearrange 4 + 5 + 6 + 7 + 8: q, 15, 22, 30
472, J 58, 836, 1oq ------ 4163 b 15, 18, 26, 33; rearrange 3 + 6 + 7 + 8 + q; q, 16,24, 33
472, J 58, 1oq, 836 ------ 3qoq
2 Team A: 14, 18, 21, 27
158, 472, 836, 1oq ------ 47q1
Team B: 5, 13, 17, 24
158, 472 1oq, 836 ------ 4537
Team C: q, 14, 22, 31
J 58, 836, 1oq, 472 ------ 5265
3 Team A: rearrange 3 + 4 + 5 + 6 + q; 7, 12, 18, 27
ORM 15 Team B: rearrange 2 + 3 + 4 + 7 + 8: 5, q, 16, 24
1 Team C: rearrange 3 + 5 + 6 + 8 + q; 8, 14, 22, 31
4a3 b7 c4
DRM20
1 a +8 - --.. ~
7 15 23 31 3q 16 25 34 43 52
12 20 28 36 44 13 22 31 40 4q
17 25 33 41 4q 10 1q 28 37 46
22 30 38 46 54 7 16 25 34 43
c -4 ...
36 32 28 24 20 2 a 25 + 12 + q1
42 38 34 30 26 b2+5+1+2+q+7
48 44 40 36 32 c 25 + 12-q- 7
d2+51-2q + 7
54 50 46 42 38
e 25 - 1 - 2 - q - 7

© HarperCollinsPub/ishers ltd 1997 STEPS 4b Differentiation Pack