## Search found 20 matches

- Sat Nov 11, 2006 3:54 am UTC
- Forum: Logic Puzzles
- Topic: The Princess Bride variant [solution]
- Replies:
**26** - Views:
**9760**

Player A can win, assuming they're allowed to screw with their own poisons. First, he drinks the weakest of his own poisons (he can assume player B will give him number 10, but just to be safe...). Then, when it's his turn to pass a poison to player B, he passes a vial of water, following which play...

- Fri Nov 10, 2006 3:16 am UTC
- Forum: Logic Puzzles
- Topic: Pancake Problem
- Replies:
**56** - Views:
**19499**

It's 2/3. Put it this way: There are 6 pancakes. Each pancake is linked to another one, A-B, C-D, and E-F. So if you get Pancake A you also get Pancake B, and so on. A-C are white and D-F are black. If you grab a pancake at random, and it happens to be black, what are the chances the other pancake y...

- Sat Oct 21, 2006 2:30 am UTC
- Forum: Logic Puzzles
- Topic: Three princesses
- Replies:
**446** - Views:
**202811**

Actually, my solution only relies on the sisters knowing their relative ages. Xandah's solution also works, as does any that effectively involves comparing an attribute that scales from the lying sister to the truth-telling sister. As far as I can think of, age and honesty are the only two such attr...

- Thu Oct 12, 2006 3:20 am UTC
- Forum: Logic Puzzles
- Topic: Yet Another Hat Problem
- Replies:
**18** - Views:
**12036**

- Tue Oct 10, 2006 6:50 am UTC
- Forum: Logic Puzzles
- Topic: Carnival of Bad Processors: solution
- Replies:
**15** - Views:
**7260**

- Tue Oct 10, 2006 2:51 am UTC
- Forum: Logic Puzzles
- Topic: Pirate Democracy [Solution]
- Replies:
**27** - Views:
**11818**

The collusion idea might work, but it's more complicated than you indicate. If 1 and 2 both vote against the first proposal, the second proposal will simply offer 1 coin to pirates 3-51. Though maybe not. The question is now whether it's logical for those pirates to accept, knowing that if they don'...

- Sat Oct 07, 2006 3:04 am UTC
- Forum: Logic Puzzles
- Topic: Weighing Marbles
- Replies:
**48** - Views:
**43764**

- Wed Oct 04, 2006 6:43 pm UTC
- Forum: Logic Puzzles
- Topic: locker problem solution
- Replies:
**28** - Views:
**21511**

Wow, I think being dumb helps sometimes. This seems like an easy problem to overthink, but I got it very quickly without any real mental gymnastics. Once you figure out that each student represents a factor (student 4, for instance, will only modify lockers that are multiples of 4), it's a pretty sh...

- Wed Oct 04, 2006 6:39 pm UTC
- Forum: Logic Puzzles
- Topic: The Locker Puzzle
- Replies:
**5** - Views:
**9620**

- Wed Oct 04, 2006 9:26 am UTC
- Forum: Logic Puzzles
- Topic: Sex problem
- Replies:
**35** - Views:
**15798**

The question doesn't specify how you know one of the children is a boy. If you grabbed the first child and looked at its genitals, and it happened to be a boy, then the chances that the second child is a girl are 50%, since it's an independent question. If, on the other hand, all the question is say...

- Tue Sep 26, 2006 2:48 am UTC
- Forum: Logic Puzzles
- Topic: The Cube Factory, and a Variant
- Replies:
**28** - Views:
**12182**

The problem seems to be that there is an uncountably infinite set of possibilities with finite limits. As a result, wherever you put the dividing line (for the moment, we'll work with edge length, though it's the same idea for any other measurement), you'll end up with two uncountably infinite sets,...

- Sun Aug 20, 2006 4:03 am UTC
- Forum: Logic Puzzles
- Topic: More fun with paradoxes
- Replies:
**48** - Views:
**22021**

I can see why the jar would be empty at the end in the first case, but since that's a direct result of removing marbles from the jar on every step, I don't see where the paradox arises. Of course the jar isn't empty in the second step, you never removed the marbles you put in it. Am I missing someth...

- Sat Aug 12, 2006 8:02 am UTC
- Forum: Logic Puzzles
- Topic: Sleeping Beauty Puzzle
- Replies:
**41** - Views:
**21554**

- Sat Aug 12, 2006 7:02 am UTC
- Forum: Logic Puzzles
- Topic: Sleeping Beauty Puzzle
- Replies:
**41** - Views:
**21554**

- Sat Aug 05, 2006 2:04 am UTC
- Forum: Logic Puzzles
- Topic: Sum and Product Man
- Replies:
**27** - Views:
**15998**

Yeah, you can eliminate any sum that is 2 more than a prime number, since that sum is then a sum of two prime numbers. That still leaves a lot of odd numbers that aren't the sums of two primes, however. This is as far as I've gotten: When the product guy indicates he knows the answer, that implies t...

- Fri Aug 04, 2006 7:03 am UTC
- Forum: Logic Puzzles
- Topic: Sum and Product Man
- Replies:
**27** - Views:
**15998**

Either I'm missing a key piece of information, or you're a bastard. I've figured out the logical implications of all the statements, weeded out all the possibilities I could ahead of time (except that I'm not sure whether all even numbers below 200 are sums of two primes), and I've still got a very ...

- Fri Aug 04, 2006 1:44 am UTC
- Forum: Logic Puzzles
- Topic: Weighing Marbles
- Replies:
**48** - Views:
**43764**

- Fri Jul 28, 2006 8:12 pm UTC
- Forum: Logic Puzzles
- Topic: Weighing Marbles
- Replies:
**48** - Views:
**43764**

- Fri Jul 28, 2006 6:03 am UTC
- Forum: Logic Puzzles
- Topic: Weighing Marbles
- Replies:
**48** - Views:
**43764**

### Weighing Marbles

Here's a fun one I just heard. It took me about 6 hours to solve, and I eventually got the answer by proving that it was unsolvable, then figuring out why the proof was wrong and going from there. So if somebody solves this in half an hour, I'd appreciate it if you waited a couple hours to post the ...

- Thu Jul 20, 2006 10:33 pm UTC
- Forum: Logic Puzzles
- Topic: Three princesses
- Replies:
**446** - Views:
**202811**