SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Pastimes : Laughter is the Best Medicine - Tell us a joke
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Jeffrey S. Mitchell who wrote (61641)12/9/2022 6:49:38 PM
From: Sun Tzu  Read Replies (1) of 62549
 
I could derive it with set theory, but I always prefer to start with an intuitive approach. E.g. consider the math puzzle 2^x = x^2. It is quite challenging to solve with math. But intuitively it is obvious that x=2 and x=4 are the two natural answers (there is also a 3rd answer, but not natural or satisfying).

Back to your puzzle...since the person could only count and flip, the only possible answer was to count 30 coins and flip them. That was the intuitive answer, which we can then validate with math.

Here's another intuitive answer that I felt I had to provide because the author was the exact opposite of what he claims to be:

Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News