Henry Ernest Dudeney/Puzzles and Curious Problems/277 - Tessellated Tiles/Solution

Puzzles and Curious Problems by Henry Ernest Dudeney: $277$

Tessellated Tiles

Here we have $20$ tiles, all coloured with the same four colours.

The puzzle is to select any $16$ of these tiles that you choose and arrange them in the form of a square,

always placing same colours together -- white against white, red against red, and so on.

Solution

Discard the first tile in each of the four horizontal rows, and arrange the rest as follows:

Sources

• 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Solutions: $277$. -- Tessellated Tiles
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Answers: $460$. Tessellated Tiles