SOLUTION: A grid below contains one large square and four small squares with circles on each corner of the smaller squares. Show that, up to rotation and reflection, there is only one way to
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Question 1166051: A grid below contains one large square and four small squares with circles on each corner of the smaller squares. Show that, up to rotation and reflection, there is only one way to fill the empty circles with the numbers 1 to 9 so that the sums of the numbers at the vertices of all five squares are the same. Answer by ikleyn(52829) (Show Source):
