Henry Ernest Dudeney/Puzzles and Curious Problems/350 - The Keys and Ring/Solution
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Puzzles and Curious Problems by Henry Ernest Dudeney: $350$
- The Keys and Ring
- Colonel Crackham the other day produced a ring and two keys, as here shown,
- cut out of a solid piece of cardboard, without a break or join anywhere.
Solution
- First cut out the keys and ring in one piece, as here shown.
- Now cut only half through the cardboard along the eight little dark lines,
- and similarly cut half through on the eight little dotted lines on the other side of the cardboard.
- Then insert a penknife and split the card below the four little squares formed by these lines,
- and the keys will come apart with the keys loose on the ring and no join.
Sources
- 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Solutions: $350$. -- The Keys and Ring
- 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Answers: $531$. The Keys and Ring