- Centre shape is always a specific shape
- Number of shapes
- Number of corners/sides
- Whether it touches the edge of the box
- More black shapes, even number of shapes
More white shapes, odd number of shapes
- All straight edges + odd number of shapes
All curved edges + even number of shapes
Or vice versa
- Total number of sides is odd/even (which can then be split into colour)
- Total number of sides is odd then an x shape
Total number of sides is even then a + shape
X or +
- + if total number of sides is even
x if total number of sides is odd
All the black and striped shapes add up to an even number of sides
If shapes are unshaded then pairs are an x
If one pair is shaded then +
If one or more odd sided shapes then x
If all shapes are even sided then +
X when white shapes
+ when black shape
Shapes on opposite ends are same/different/number of sides
+ is rotated to an x if there are an odd number of shaded shapes
+ is rotated to an x if there an an even number of shaded shapes
X if there are two shaded shapes at opposite ends to each other - at least one pair there
can be three shaded but one pair is on opposite so x
+ if there are two shaded shapes at opposite ends to each other
- Centre shape with circles around it