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Apr 8, 2008 3:33 PM
#1

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Dec 2007
298
There are 8 coins and a set of scales. One of the coins is a fake. It is lighter than the real coins . Can you identify the fake one?



Difficulty: MEDIUM


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Apr 8, 2008 3:36 PM
#2

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Dec 2007
298
and remember if u win ...... I doubt u guys may even have a chance.But risk it all to win it all -_- ( bored face)


Apr 14, 2008 3:33 PM
#3
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Mar 2008
772
If it's 8 coins, you can just put 4 coins on each scale and whichever set is lighter, take those 4 coins and put 2 on each scale . . . Whichever set is lighter, take those 2 coins and put 1 on each scale. The lighter side is definitely the one with the fake coin.

Maybe there's an easier way but I'm thinking process of elimination.
Apr 15, 2008 9:39 AM
#4
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Dec 2007
92
I agree with the person before me. You equal it out between the coins. Which is lighter should most likely be the one with the coin. Unless there is a catch in that case it could be in the heavier pile. Still it is to go by the last person to constructe a plan to devide the coins. Or you could do it the hard way and do it one by one for awhile,... You may have a better chance by doing it one by one then dividing it into halves.
Apr 15, 2008 3:07 PM
#5

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Dec 2007
298
good u 2.. contest over.. sakura_r0se won ( firsrt 1 to answer even though klo363 said she agreed with sakura_r0se . In that case the fist 1 that answers)



Mar 11, 2012 9:28 PM
#6

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Nov 2011
1980
Couldn't you just have put 2 coins on the scale at a time as well? I mean if its even, then you know it isn't either of those coins, and if the scale shows that one of them is lighter, then you know you have the fake coin. Repeat putting 2 coins on the scale( 1 on each side) at a time until you get the fake coin to make the scale unbalanced. The other way works too, and I know I'm like 4 years late to this thread!

"I like to expose what people hide. I'm an intellectual rapist." - Furudo Erika
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It’s time to ditch the text file.
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