Arrange the dominoes in seven squares. The number of dots along each side of the square must be equal to the number in the middle. Double click the dominoes (or use the rotate button) to rotate them then drag them into place.
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Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments. The solutions to this and other Transum puzzles, exercises and activities are available here when you are signed in to your Transum subscription account. If you do not yet have an account and you are a teacher, tutor or parent you can apply for one here. A Transum subscription also gives you access to the 'Class Admin' student management system, many more teaching resources and opens up adfree access to the Transum website for you and your pupils. This challenge is adapted from Mathematische Basteleien Dominoe Puzzles. 
Transum,
Thursday, November 21, 2013
"This puzzle is traditionally posed as a challenge to create seven square frames with all 28 dominoes so that the sums of the numbers of dots are the same at all four sides. Transum has simplified the problem slightly by showing what the totals are for the seven square frames. Are there any other solutions to the traditional problem which produce different side totals? Please let us know!
[Tip: If the puzzle area is too large for your screen change the view zoom factor until you can see the whole area.]."
Gharbi, Tunisia
Sunday, August 30, 2015
"Very good."