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There is a 5×5 grid. You have to fill 25 squares with 0 & 1. Every neighboring square's number's product has to be 0.,,

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There is a 5×5 grid in front of you. You have to fill 25 squares with only 0 and 1. But, every neighboring square's number's product has to be 0. How many possible grids there are?

posted Jan 5 by anonymous

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1 Answer

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There are 2 possible patterns to fill the grid, every 1 must have 0 in neighboring square, see picture

enter image description here

answer Jan 16 by Hanifa Mammadov

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? + ? + ? + ? + ? = 30

You have to fill numbers in place of question marks. The numbers that you can use are 1, 3, 5, 7, 9, 11, 13 and 15. You can repeat the numbers if you like.

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