Henry Ernest Dudeney/Modern Puzzles/218 - A Square with Four Pennies

Modern Puzzles by Henry Ernest Dudeney: $218$

A Square with Four Pennies

Can you place four (old) pennies together so as to show a square?

They must all lie flat on the table.

Sources

• 1926: Henry Ernest Dudeney: Modern Puzzles ... (previous) ... (next): Unclassified Problems: $218$. -- A Square with Four Pennies
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Unclassified Puzzles: $514$. A Square with Four Pennies