7b53 wrote:yes, indeed...an old one. champagne;
does it make us feel 30 yrs younger...
with the computer these day, it might have another solution.
or can it have more than one solution ?
It takes at worth some hours to figure out the solution (some will answer in some minutes), and likely several days to work out a program to do the same.
There is not much room for several really different solutions
champagne wrote:The player must say at the end if the false coin is heavier or lighter.
Smythe Dakota wrote:OK, this banter has been going on long enough now. It's about time for somebody to post a spoiler.
Smythe Dakota wrote:... what is the smallest number X of weighings that is guaranteed not only to find the false coin, but also to determine whether it is lighter or heavier than the others?
Obviously, for each N, X is greater than or equal to W. Does X ever equal W, or is X always greater?
Pat wrote:ronk wrote:I can't envision a scenario where the false coin is found without knowing whether it is lighter or heavier. Does anyone have an example?
first weigh A:B
next weigh A:C
if D is the fake, we don't know if it is light or heavy