Henry Ernest Dudeney/Puzzles and Curious Problems/308 - Domino Hollow Squares/Solution

by : $308$

 * Domino Hollow Squares

Solution

 * Dudeney-Puzzles-and-Curious-Problems-308-solution.png


 * Remember this rule:
 * ''If the pips on your dominoes sum, say, to $7$ (as in the first example),
 * and you wish the sides to add up to $3$, then $4 \times 3 - 7$ gives us $5$ as the sum of the four corners.