Sixteen five gallon containers form a 4x4 grid. Move only ONE container so as to make the row sums, column sums, and main diagonal sums, the same.
[1] [2] [3] [2]
[2] [2] [3] [1]
[3] [1] [2] [4]
[2] [4] [5] [3]
(1) We consider the full container in the last row, and fill the 4 container in the last row,
(2) Consider the 3 container in the second row, and empty the rest in the 1 container at the top left.
The result of the 2-step operation will be as follows:
[3] [2] [3] [2]
[2] [2] [5] [1]
[3] [1] [2] [4]
[2] [5] [0] [3]
Edited on December 27, 2022, 1:49 am
Puzzle Thoughts
