Matrix Machine
Build the missing piece. Two rules are hiding in this grid: one runs across, one runs down.
A matrix hides one rule per direction. In each row the shape stays the same, and down the rows it goes star, moon, diamond. Across each row the count climbs 1, 2, 3 and the fill goes outline, striped, solid. Down each column the count and the fill stay the same. The missing cell sits where row 3 meets column 3, so it must obey both at once: three solid diamonds.
What to say if they get stuck
- Read one row at a time, left to right. What never changes along a row?
- Now read one column at a time, top to bottom. Two things change as you move across the columns.
- Row 3 is the diamond row. Column 3 always holds three shapes, filled in solid.
