Revision history of "1990 AJHSME Problems/Problem 25"

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  • (cur | prev) 22:17, 11 July 20095849206328x (talk | contribs). . (2,324 bytes) (+2,324). . (Created page with '==Problem== How many different patterns can be made by shading exactly two of the nine squares? Patterns that can be matched by flips and/or turns are not considered different.…')