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A pretty easy but fun math problem, Coin flip
mipadi
post Sep 22 2009, 09:46 AM
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On Monday, you flip a coin all day. You start flipping it until you see the pattern Head, Tail, Head. You record the number of flips required to reach this pattern, and start flipping again (and counting up from 1 again) until you see that pattern again, you record the second number, and start again. At the end of the day you average all of the numbers you’ve recorded.

On Tuesday you do the EXACT same thing except you flip until you see the pattern Head, Tail, Tail.

Will Monday’s number be higher than Tuesday’s, equal to Tuesday’s, or lower than Tuesday’s?

No Googling for the answer!
 
 
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sixfive
post Sep 22 2009, 01:24 PM
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I've seen this problem before. I couldn't figure it out and when I finally read an explanation I was thinking "OOooooohhhhh! Now I get it!"
 
mipadi
post Sep 22 2009, 01:33 PM
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I think I am missing something in that comic.
 
sixfive
post Sep 22 2009, 01:39 PM
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o idk i just found it amusing, kinda a jab at people who try to tell jokes or riddles or word problems that are kinda aimed at tricking people, as clever as they may be
 
mipadi
post Sep 22 2009, 02:00 PM
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Yeah, I just don't get the clever trick inherent in the comic -- the part where he says "It's language!" I was hoping that by taking the time to type this out, it would suddenly dawn on me...but that didn't happen.

Anyway, this problem isn't really "clever", it just demonstrates an (arguably) interesting use of statistics.
 
sixfive
post Sep 22 2009, 02:05 PM
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Yeah, I suppose so. I guess I found the comic humorous because in high school we had an english teacher that did the same thing to us, and everyone got "hungry" and "angry." No one assumed that "Gry" was the third word.
 
mipadi
post Sep 22 2009, 02:11 PM
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QUOTE(serotonin @ Sep 22 2009, 03:05 PM) *
Yeah, I suppose so. I guess I found the comic humorous because in high school we had an english teacher that did the same thing to us, and everyone got "hungry" and "angry." No one assumed that "Gry" was the third word.


"Gry" is an obsolete word, though.

Wikipedia has an article on this riddle, of course; I think the comic is referring to #1 in this list.
 
sixfive
post Sep 22 2009, 02:14 PM
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I think so, too.
 
dosomethin888
post Sep 22 2009, 04:42 PM
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Wow, that comic plus the Wikipedia link is totally tripping me out. I'm very confused.
 

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