Henry Ernest Dudeney/Puzzles and Curious Problems/293 - The Twenty Pennies/Solution

by : $293$

 * The Twenty Pennies

Solution
Start with the square of $16$ pennies in $4$ rows of $4$.

Place:
 * one penny on the first penny in the first row
 * one penny on the third penny in the second row
 * one penny on the fourth penny in the third row
 * one penny on the second penny in the fourth row.