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- 15:32, 12 February 2012 (diff | hist) . . (-190) . . Talk:2012 AMC 10A Problems/Problem 20 (Blanked the page) (current)
- 15:18, 10 February 2012 (diff | hist) . . (-2) . . Talk:2012 AMC 10A Problems/Problem 20
- 15:08, 10 February 2012 (diff | hist) . . (+192) . . N Talk:2012 AMC 10A Problems/Problem 20 (Created page with "I get <math>\frac{49}{256}</math> for this problem. I used your same logic, but noted that the center square can start out white or black, giving us: <math>\frac{2\times7\times7...")
