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In this 10-by-10 square grid, initially 9 unit squares are shaded, as shown. Every minute, any unit square that shares at least two sides with shaded unit squares becomes shaded. When no more unit squares can become shaded, what is the number of unit squares that are shaded?

 Jan 7, 2021
 #1
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This problem is unanswerable, because you have not included a diagram.

 Jan 8, 2021
 #2
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i did include a diagram. it didnt show up?

 

here it is again with a link.

 

https://i.postimg.cc/hPCSTkh6/image.png

 Jan 8, 2021
edited by Guest  Jan 8, 2021

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