Henry Ernest Dudeney/Puzzles and Curious Problems/312 - Domino Rectangle

by : $312$

 * Domino Rectangle
 * Arrange the $28$ dominoes exactly as shown in the diagram, where the pips are omitted,
 * so that the pips in every one of the seven columns shall sum to $24$, and the pips in every one of the eight rows to $21$.


 * Dudeney-Puzzles-and-Curious-Problems-312.png


 * The dominoes need not be $6$ against $6$, $4$ against $4$, and so on.