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

by : $308$

 * Domino Hollow Squares
 * It is required with the $28$ dominoes to form $7$ hollow squares, like the example given,
 * so that the pips in the four sides of every square shall add up alike.


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


 * All these seven squares need not have the same sum, and, of course, the example given need not be one of your set.