Go from a square to another, vertically or horizontally. Start with the bottom left square and end with the top right one. Respecting these two rules, find nine numbers which sum equals 66. How many choices are there?
Go from a square to another, vertically or horizontally. Start with the bottom left square and end with the top right one. Respecting these two rules, find nine numbers which sum equals 66. How many choices are there?
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