tag:blogger.com,1999:blog-1147784181901427860.post6326858716827977241..comments2020-02-12T08:54:20.307-08:00Comments on The Weekly Riddle: Heads and TailsCharlie Guthriehttp://www.blogger.com/profile/15624106792764866509noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-1147784181901427860.post-8148207615549851682013-06-10T18:35:14.950-07:002013-06-10T18:35:14.950-07:00We don't know value of X here, however we know...We don't know value of X here, however we know for sure that they have equal heads and tails on each table<br /><br />can we stretch it a bit further?<br />will it be possible to divide it into groups of 10 heads and 10 tails?<br />If yes how?<br />If no then can we prove it that it is impossibleamitpriyadarshihttps://www.blogger.com/profile/07316623079749225123noreply@blogger.comtag:blogger.com,1999:blog-1147784181901427860.post-37557045293633823282013-05-17T13:18:53.727-07:002013-05-17T13:18:53.727-07:00Yes, it does work for the general case obviously. ...Yes, it does work for the general case obviously. I missed that the first time around. The reason it works is simply the even number and the change of state.Nathanhttps://www.blogger.com/profile/10338488051688777207noreply@blogger.comtag:blogger.com,1999:blog-1147784181901427860.post-27696675657013301612013-05-17T13:16:18.707-07:002013-05-17T13:16:18.707-07:00Does that work for the general case of N coins, wh...Does that work for the general case of N coins, where N is even? No, it doesn't. Does it work just for groups that are multiples of 10 coins? <br />Why does it work?Nathanhttps://www.blogger.com/profile/10338488051688777207noreply@blogger.comtag:blogger.com,1999:blog-1147784181901427860.post-14788979975680512372010-06-16T08:57:35.584-07:002010-06-16T08:57:35.584-07:00Split into two groups of 10. Group A will have X h...Split into two groups of 10. Group A will have X heads, and 10-X tails. Group B will have X tails, and 10-X heads. Flip every coin in group B. Both groups now have X heads and 10-X tails.Rob Stronghttps://www.blogger.com/profile/14761105849790955206noreply@blogger.com