Domino Window 1

Directions: Use four of these dominoes to form a square with the same number of dots on each side.


What is the greatest sum you can make?
What is the least (smallest) sum you can make?


There are many possibilities. One possibility is the sum of each side is 11.

Another solution is the sum of each side is 12.

Source: Joshua Nelson

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Adding Single Digits

Directions: Using the digits 0 to 9 at most one time each, place a digit …


  1. 11 and 12 for the sum of each side

  2. The solution of 8 on each side and 7 on each side is also possible

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