Difference between revisions of "Talk:2013 AMC 12A Problems/Problem 20"
(Created page with "Disucssion: COuld someone please explain how you got the first set of conditions is <math>45*10-\sum_{k=1}^{9}\dbinom{k+1}{2}</math>? Thank you!") |
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Latest revision as of 19:16, 25 November 2019
Disucssion:
COuld someone please explain how you got the first set of conditions is 
? Thank you!
