1BThe shading alternates between white and black each step.
2AOne more dot appears each step.
3EThe shading alternates between vertical stripes and black each step.
4CThe shading repeats in a 3-step cycle (diagonal stripes → vertical stripes → white).
5BEach step: rotate 90° clockwise.
6DThe dot moves one position clockwise each step.
7DThe shape grows larger each step.
8EEach step: rotate 90° anticlockwise.
9CThe shading alternates between white and grey each step.
10AEach step: mirror top–bottom.
11AThe dot moves one position clockwise each step.
12CThe shading repeats in a 3-step cycle (diagonal stripes → vertical stripes → white).
13AThe arrows turn a quarter turn clockwise each step.
14DThe shading repeats in a 3-step cycle (white → vertical stripes → horizontal stripes).
15ETwo independent rules: the corners reverse the shading; the centre reverses shading.
16BThe dot moves one position clockwise each step.
17BThe shading alternates between white and diagonal stripes each step.
18CEach step: mirror top–bottom.
19EThe dot moves one position clockwise each step.
20AEach step: rotate 90° anticlockwise.
21EA dot is added inside the shape.
22CThe shading is reversed.
23DEach shape: the dot turns 90 clockwise°.
24AEach shape: rotate 90° clockwise.
25CEach shape: the dot turns 90 anticlockwise°.
26EEach shape: mirror left–right.
27AEach shape: the dot turns 90 anticlockwise°.
28CThe stem gains one more arm at the top.
29AEach shape: rotate 90° clockwise, then reverse the shading.
30EOne dot is removed from the shape.
31BThe shading of every mark is reversed.
32DEvery arrow turns clockwise, a quarter turn.
33EEach shape: rotate 180°, then reverse the shading.
34AThe shape shrinks smaller.
35ATwo independent rules: the corners stay the same; the centre changes to the next shape in the cycle (circle→square→diamond→triangle→circle).
36ATwo independent rules: the corners mirror top–bottom; the centre reverses shading.
37ATwo independent rules: the corners rotate 90° clockwise; the centre stays the same.
38DThe shading is reversed.
39EEach shape: the dot turns 90 anticlockwise°.
40CTwo independent rules: the corners rotate 90° clockwise; the centre changes to the next shape in the cycle (circle→square→diamond→triangle→circle).
41EEvery figure in a row has the same kind of shape; every figure in a column has the same number of shapes.
42EAcross the top row the shading reverses; the same happens in the bottom row.
43EEvery figure in a row has the same number of shapes; every figure in a column has the same kind of shape.
44BEvery figure in a row has the same number of crossbars; every figure in a column has the same top.
45CEvery row and column contains each shading, each shape and each inner mark exactly once.
46AEvery shape in a row has the same number of corners; every shape in a column has the same shading.
47DAcross the top row the shape becomes large; the same happens in the bottom row.
48AEvery row and column contains each shading and each shape exactly once.
49EEvery shape in a row has the same number of corners; every shape in a column has the same shading.
50DEvery shape in a row has the same shading; every shape in a column has the same number of corners.
51DEvery figure in a row has the same number of crossbars; every figure in a column has the same top.
52EEvery figure in a row has the same top; every figure in a column has the same number of crossbars.
53DEvery row and column contains each inner mark, each shading and each shape exactly once.
54AEvery shape in a row has the same number of corners; every shape in a column has the same shading.
55CAcross the top row one more line crosses the stem; the same happens in the bottom row.
56BAcross the top row one line leaves the stem; the same happens in the bottom row.
57DAcross the top row one more dot appears; the same happens in the bottom row.
58AEvery row and column contains each shading, each inner mark and each shape exactly once.
59DEvery shape in a row has the same inner mark; every shape in a column has the same shading.
60AEvery shape in a row has the same shape; every shape in a column has the same shading.
61ETop letter = how many lines, bottom letter = where the lines sit.
62ATop letter = shape, bottom letter = which one is black.
63BTop letter = frame, bottom letter = centre shape.
64CTop letter = frame, bottom letter = centre shape.
65ETop letter = where the lines sit, bottom letter = how many lines.
66ATop letter = number of corners, bottom letter = whether a corner points inwards.
67ATop letter = size of the dots, bottom letter = how many dots.
68DTop letter = shading, bottom letter = number of corners.
69DTop letter = number of corners, middle letter = whether a corner points inwards, bottom letter = shading.
70CTop letter = frame, bottom letter = centre shape.
71ETop letter = how many lines, bottom letter = where the lines sit.
72ETop letter = frame, bottom letter = centre shape.
73ATop letter = shape on top, bottom letter = bars at the foot.
74ATop letter = how many joined shapes, bottom letter = shape at each join.
75ETop letter = shading of the dots, bottom letter = how many dots.
76CTop letter = number of corners, bottom letter = shading.
77DTop letter = number of corners, bottom letter = shading.
78BTop letter = how many dots, bottom letter = shading of the dots.
79ETop letter = whether a corner points inwards, bottom letter = number of corners.
80DTop letter = the mark, bottom letter = which corner holds the mark.