https://artofproblemsolving.com/wiki/index.php?title=Talk:2013_AMC_12A_Problems/Problem_20&feed=atom&action=historyTalk:2013 AMC 12A Problems/Problem 20 - Revision history2024-03-28T11:11:02ZRevision history for this page on the wikiMediaWiki 1.31.1https://artofproblemsolving.com/wiki/index.php?title=Talk:2013_AMC_12A_Problems/Problem_20&diff=112184&oldid=prevVsamc: 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!"2019-11-25T23:16:20Z<p>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!"</p>
<p><b>New page</b></p><div>Disucssion:<br />
<br />
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!</div>Vsamc