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Guest Message by DevFuse
 

radio1

Member Since 01 Oct 2013
Offline Last Active Nov 07 2013 03:08 PM
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Posts I've Made

In Topic: Simple money probability

04 November 2013 - 02:47 PM

Spoiler for my two cents

It's not a complete answer, as the 15 coins could also be 9 dimes, 1 nickel, and 5 pennies.

I think you're on the right track, but the final solution must factor in all the possible combinations of coins that meet the 19 and 15-coin criteria.


In Topic: blind bartender

02 October 2013 - 02:07 PM

if all 4 glasses are up or all 4 down, the game is over at the start.

I see from BMAD's earlier respose that this is his intended interpretation, but to me the wording of the puzzle doesn't make that clear.  As stated, the puzzle seems to have the bartender blindfolded and engaged in a minimum of one "round" of turning over either 1 or 2 glasses, as only "After each round, the bartender is told if all glasses are oriented the same and the game is over.".

Fun puzzle though either way -- and the logic in plasmid's solution extends to either interpretation.

Thanks to all.

-radio1


In Topic: blind bartender

01 October 2013 - 04:09 PM

Very neat problem. The answer is certainly unintuitive.

Spoiler for Checkmate in 7

Edit: renamed states for clarity

Hmmm... does your "checkmate in 7" work if all four glasses are initially in the same state, or would that make it a "checkmate in 8", or ??