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erichw1504's avatar

What is your favorite logic question, puzzle, or game?

Asked by erichw1504 (26453points) November 16th, 2010

What are some great questions, puzzles, or games that are solved logically? Have you ever completed them? How long did it take you? Have you ever gotten extremely frustrated over one?

Questions can be a simple one liner or a more elaborate one.
Puzzles can be wooden, metal, or even online versions.
Games can be video or board.

Please don’t provide the answer to your question or puzzle. Let someone else try to.

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27 Answers

mrlaconic's avatar

What rule has been used to create the following number sequence:

8 5 4 9 1 7 6 3 2 0

CyanoticWasp's avatar

I like sudoku, and I do those puzzles nearly daily. I enjoy the Jumble® puzzle in the paper, too, and as often as not just do those in my head in a couple of seconds—no challenge any more.

And I enjoy word puzzles in logic, such as this type (just google ‘logic puzzles’ and you’ll get the same listings I picked this one from).

erichw1504's avatar

@mrlaconic Oooo, I like those type of logic questions!

poisonedantidote's avatar

You are in a dungeon, there are two doors. One door leads to freedom, the other door leads to death, and you don’t know what door leads to what. Each door is guarded by a guard. One guard will always lie, the other will always tell the truth, but you dont know what one tells the truth and what one lies.

You have one question you may ask, you may ask both guards, at the same time or one by one, but it has to be the same question.

What question do you ask to find the door that leads to freedom?

I also quite like the question “What would you do if God commanded you to disobay him?”

downtide's avatar

I am a total sudoku addict. Only the fiendish ones are challenging enough.

erichw1504's avatar

@poisonedantidote I would ask one guard, “If I were to ask the other guard which door leads to freedom, what would he say?” and whatever door he points to, I would go in the other one.

Blueroses's avatar

My favorite riddle for confusing people and making them argue:
Three friends check into a motel for the night and the clerk tells them the bill is $30, payable in advance. So, they each pay the clerk $10 and go to their room. A few minutes later, the clerk realizes he has made an error and overcharged the trio by $5. He asks the bellhop to return $5 to the 3 friends who had just checked in. The bellhop sees this as an opportunity to make $2 as he reasons that the three friends would have a tough time dividing $5 evenly among them; so he decides to tell them that the clerk made a mistake of only $3, giving a dollar back to each of the friends. He pockets the leftover $2 and goes home for the day! Now, each of the three friends gets a dollar back, thus they each paid $9 for the room which is a total of $27 for the night. We know the bellhop pocketed $2 and adding that to the $27, you get $29, not $30 which was originally spent. Where did the other dollar go?

erichw1504's avatar

@Blueroses: The clerk has $25, the friends have $3, and the bellhop has $2 in the end.

25 + 3 + 2 = 30

Blueroses's avatar

@erichw1504 yes. simple misdirection, but it is always amusing to watch people reason it out.

Paradox's avatar

Chess puzzles (and chess itself), mazes (I love mazes) and sudoku.

absalom's avatar

It’s got to be Ico, one of my favorite video games.

flutherother's avatar

I like this one: I have 17 Camels, and I have three sons. Divide my camels in such a way that my eldest son gets half of them, the second one gets ⅓rd of the total and my youngest son gets 1/9th of the total number of camels

Pied_Pfeffer's avatar

Questions 20 Questions
Puzzles Soduku by myself and a jigsaw puzzle with a friend.
Games Mystery-solving ones, like Clue or computer games where tasks need to be completed in order to garner more information to solve it.

Blueroses's avatar

@flutherother that is another great classic. I’ve seen mathematics students argue themselves silly over the leftover .9444 camel.

downtide's avatar

@flutherother and @Blueroses : nothing that can’t be solved with a decent meat-cleaver. The remaining 0.9444 camel is on the barbecue.

flutherother's avatar

@downtide That was funny, about the funniest thing I have heard all day. Don’t know if I could manage a whole 0.9 of a camel myself though :-)

Blueroses's avatar

I’ll admit, when I first heard that riddle I didn’t see what was so difficult about it, but I did wonder who smoked the other 3 Camels…

@downtide ha ha! Does camel taste like chicken?

downtide's avatar

@Blueroses more like lean beef, apparently: Actually sounds really good.

Blondesjon's avatar

April’s Mom has four daughters. They are named Winter, Spring, Summer, and _____?

downtide's avatar

@Blondesjon that one reminds me of the “St Ives” classic.

As I was going to St Ives
I met a man with seven wives
Each wife had seven sacks
Each sack had seven cats
Each cat had seven kits.
Kits, cats, sacks, wives,
how many were going to St Ives?

Blueroses's avatar

Ha ha, @Blondesjon ummmm, April?

CyanoticWasp's avatar

Oh, I didn’t realize that we were looking for particular questions. In that case…

If a chicken-and-a-half can lay an egg-and-a-half in a day-and-a-half, how long would it take a chicken to lay a dozen eggs?

jlelandg's avatar

My apple has gotten me back into chess a little bit (but I have trouble losing to people). The game I wish I’d been playing all my life (instead of chess) is backgammon which is a game of probability and chance, therefore the game is not only about logic, but there is some luck involved as well: which is why alot of people gamble on it.

logzlog's avatar

@poisonedantidote you stab one guard in the foot.if he yells “you stabbed me!what’s wrong with you?“he is telling the truth.

Skaggfacemutt's avatar

There are three explorers and three cannibals travelling together through the jungle. They come to a river that they have to cross. There is a boat that only holds two people at a time. After getting to the other side, someone has to bring the boat back for the next pair to go over. However, the cannibals can’t ever out-number the explorers, or they will eat them. How do you get them across?

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