Three free sheets – easy, classic and Christmas – with an answer key. Print them or save as PDF.
Sheet 1 · Easy (ages 4+)
In each grid, one picture is different from all the others. Circle it! Name: ____________
Puzzle 1 · 3×3 · star
Puzzle 2 · 3×3 · flower
Puzzle 3 · 4×4 · duck
Puzzle 4 · 4×4 · duck
Answer key
Puzzle 1: row 3, column 2 (5 pixels changed)
Puzzle 2: row 2, column 2 (5 pixels changed)
Puzzle 3: row 3, column 1 (5 pixels changed)
Puzzle 4: row 4, column 2 (5 pixels changed)
Sheet 2 · Classic
In each grid, one picture is different from all the others. Circle it! Name: ____________
Puzzle 1 · 5×5 · heart
Puzzle 2 · 5×5 · house
Puzzle 3 · 6×6 · house
Puzzle 4 · 6×6 · star
Answer key
Puzzle 1: row 3, column 4 (2 pixels changed)
Puzzle 2: row 3, column 3 (2 pixels changed)
Puzzle 3: row 2, column 3 (2 pixels changed)
Puzzle 4: row 1, column 1 (2 pixels changed)
Sheet 3 · Christmas
In each grid, one picture is different from all the others. Circle it! Name: ____________
Puzzle 1 · 4×4 · bell
Puzzle 2 · 4×4 · gift box
Puzzle 3 · 5×5 · gift box
Puzzle 4 · 5×5 · stocking
Answer key
Puzzle 1: row 3, column 4 (3 pixels changed)
Puzzle 2: row 1, column 1 (3 pixels changed)
Puzzle 3: row 1, column 1 (3 pixels changed)
Puzzle 4: row 2, column 5 (3 pixels changed)
Using the printable sheets
Every sheet has four grids that grow in size. In each grid one picture differs from the rest by a few pixels – a colour that changed or a dot that went missing. Ask players to circle the odd picture and write how long it took.