Post your logic puzzles! Once you solve a puzzle or whatever, anyone can post a new puzzle, but don't post new ones until the one in question at the time has been solved.

Start off easy with a 'famous' one:

4 guys stand in a line, all facing the same direction. They're about to be shot by a firing squad; however, the leader of the squad is a weird freak and gives them a chance to go free:

each of them are wearing either a black or white hat. There are 2 black and 2 white hats, and they have been told this. The line is arranged as followed:
(P stands for person)

facing =========>
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P1 P2 P3 | P4


There's a brick wall between persons 3 and 4. This means that person 1 can see p2 and 3, p2 can see 3, 3 can see the wall, 4 can't see ****.

The commander asks each of the people, starting from 1 and going down the line, what color hat they are wearing (they can't see their own hats). The person being asked may only answer "I am wearing a black/white hat". If he doesn't know the answer, he won't answer, and the commander will move to the next person in line.

From our "omnipresent" perspective, we can see that p1 and p3 are wearing black hats, and p2 and p4 are wearing white ones.


Which person can be 100% sure of what color hat he's wearing, and why?

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Occassional dropper-inner. Following the rhythm, drunk by the music.

fdsafdsafdsa

[This message has been edited by Pommy (edited August 01, 2004).]

The commander, because he put on his own hat.

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Do you have stairs in your house?

He doesn't have a hat. He likes the feeling of the sun on his bald head.

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Occassional dropper-inner. Following the rhythm, drunk by the music.

No one can be sure. They can't see the hats? Blindfold?

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Snail racing: (500 posts per line)

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The Massassi JO/JA Single Player contest info

Well, can sound be heard through or around the wall? 'Cuz if so, #4 has it made, since he coudl hear everyone else and there would only be one option left.

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WOOSH|-----@%

the fourth guy, because the first three will already have answered.

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Drugs & Stupidity, Tons of it.

No, they're not wearing blindfolds, and there is an answer.

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Occassional dropper-inner. Following the rhythm, drunk by the music.

Blah I post too slow.


The people won't answer if they don't know the answer.

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Occassional dropper-inner. Following the rhythm, drunk by the music.

#1 says nothing because he sees a black and a white hat.

#2 says whatever he doesn't see in front of him.

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Drugs & Stupidity, Tons of it.

Okay, okay, so they ask guy number 1, and he doesn't answer, or he does. He can see guy 2 and guy 3. If they're wearing the same color hat, he will answer, and his answer will be the opposite color. If he doesn't answer, it means that they're wearing different colored hats. In that case, when guy 2 is asked, he will know that he is wearing the color that guy 3 is NOT wearing, since he can see guy 3. So is it guy #2?

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WOOSH|-----@%

BAH! LET US DELETE OUR FRICKIN' POSTS, YOU *%#@%&#@& NAZIS!

[This message has been edited by Freelancer (edited August 01, 2004).]

I agree.

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Drugs & Stupidity, Tons of it.

[This message has been edited by Septic Yogurt (edited August 01, 2004).]

1: Ok, Maurice lives on the 15th floor of a block of apartments, and works in town. He has to take the elevator to the ground floor every morning at 8:30 and from there he goes to work.

He returns at 5:30 every evening and gets into the elevator. He takes it to the 9th floor, gets out and walks the last six floors by stairs. This would be considered odd, moreso since Maurice doesn't like climbing stairs.

So why does he do it?


2: A girl who lived in Northern Alaska wanted to go to an all-night party. Her parents said she could provided she was back by sunrise. When she came home she looked older and had longer hair. Her parents were not surprised. Why?


3: A car with faulty brakes is approaching a level crossing at 70 km/h and a train is approaching that same crossing at the same time and at the same speed. The 300m long train is 100m away from the crossing and the car is 110m away. There's nothing to stop them, but they don't collide. Why?


4: Two chess masters played five games of chess. Each won and lost the same number of games and there were no draws. How?


5: Add five lines to these six to make nine:



More later as I think of them.

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Fire Pretty - Graz's Armoury - (That's my blog...)

The Soviet Bunker - (That's my forum...)

"Thou shalt not steal. (Because the government doesn't like competition!)"

[This message has been edited by Gee_4ce (edited August 01, 2004).]

1. he is a midget (can't reach the higher buttons).

2. places that far north have 6 month long daytime and nighttimes?

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Drugs & Stupidity, Tons of it.

[This message has been edited by Septic Yogurt (edited August 01, 2004).]

[This message has been edited by Septic Yogurt (edited August 01, 2004).]

Number 2 because he can see both the ppl with black hats so he knows he will be wearing a white hat

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Alright, im sueing!

1. Correct

2. More or less - in the Arctic Circle (where the party was) she left home whenever the Sun was still out - in November it went down and didn't come up again until January.

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Fire Pretty - Graz's Armoury - (That's my blog...)

The Soviet Bunker - (That's my forum...)

"Thou shalt not steal. (Because the government doesn't like competition!)"

4. they weren't playing against each other?

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Drugs & Stupidity, Tons of it.

3: The car veered off?

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Dear lady, can you hear the wind blow, and did you know
Your stairway lies on the whispering wind.
:wq!

Got it again! Nice one. Now see if you can get 3 and 5.

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Fire Pretty - Graz's Armoury - (That's my blog...)

The Soviet Bunker - (That's my forum...)

"Thou shalt not steal. (Because the government doesn't like competition!)"

5: the white lines between the black add up to 5.

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Dear lady, can you hear the wind blow, and did you know
Your stairway lies on the whispering wind.
:wq!

I don't understand #5 fully, either the white parts between the black lines are the actual lines, or you're mixing yourself up, because i can see six there to begin with.

as for the car/train one, the only thing i can think is far fetched.... the car drove under the raised section between cars through the miracle of timing?.... i'm no good with numbers and stuff.

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Drugs & Stupidity, Tons of it.

Nobody has got my 3 or 5 yet.

By the way, I DID make a mistake on #5, it's been corrected now, but once again, goes like THIS:

5: Add five lines to these six to make nine:


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Fire Pretty - Graz's Armoury - (That's my blog...)

The Soviet Bunker - (That's my forum...)

"Thou shalt not steal. (Because the government doesn't like competition!)"

[This message has been edited by Gee_4ce (edited August 01, 2004).]

Car and train are driving parallel



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"Music is the universal language and the
dialect we speak in is Hip Hop!" - King Solomon

[This message has been edited by Molgrew (edited August 01, 2004).]

Connection Problem was faster

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"Music is the universal language and the
dialect we speak in is Hip Hop!" - King Solomon

Or, alternatively,

Molgrew can have it, I don't have any good ones right now.

You are riding a horse. In front of you there is a fire engine. You are being followed by a helicopter. To your left a sports car is driving. And to your right there is a depth.

The Question: How can you arrange that you will all stop simulaneously, without crashing and without mutual communication?

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"Music is the universal language and the
dialect we speak in is Hip Hop!" - King Solomon

You're all stopped to begin with.

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Do you have stairs in your house?

6: Moles have attacked the local tennis court, and it's the men's final, but chaos ensues as the ball is smacked down one of the mole-holes, and they need it back. The ballboy tells everyone to stay calm and that he'll get it out... even though nobody's arms are long enough to reach down and get it...

7: A detective arrives at a food warehouse and the officer there states "I doubt it's suicide Sir, for there's no ladder." The detective surveyed the scene - a 1.5m tall man hanging from a beam 3.6m above the ground. No ladders or stairs were leading to the beam, and there was no chair or box beneath the body. The floor was wet. "It's suicide," the detective concluded. How did he know?

8: A farmer wants to leave the field, outlined below to his four sons. Each son is to receive 1/4 of the field and the field must be divided so that each son gets a plot the same size and shape - trouble is, that field's triangular, so how was it divided? (See below):



9: How many hard boiled eggs can a hungry man eat on an empty stomach?

10: Here are 9 lines in a pattern of 3 triangles - move just 3 to make a pattern of 5 triangles.



11: Who's the odd one out?

TREVOR STUART THOMAS

SIMON MORRIS

SIDNEY

12: A train departs from London Euston to Inverness Scotland at exactly the same time as a train leaves Inverness to travel to London Euston. The first train travels at 140 km/h but the second only does 95 km/h. Which train is further from London Euston when they pass?

13: A man lies dead in the middle of a snow covered field. No footprints lead to his body and there's no gunshot wound. Beside him is his unopened backpack. What has happened?

14: Jim is a railway worker and finished work one day having laid all new rails along a section of track, along which he walked home. Suddenly he saw the express coming his way. Hitting a run, he actually ran fifty metres towards the train before leaping to safety... why?

15: A detective is on a case, finding a dead man beneath a car. Beside the car is a hammer and beneath the car is some twisted metal. The fingerprints confirm the dead man drove the car but the records have shown he's not the owner. The police discover the owner has been on holiday for a week. The detective concludes it's all a tragic accident. What's going on?

16: A man stopped his car outside a bank. He held up 20 people and ran out of the bank with $5000. A police officer saw all this and told him not to do it again, then let him go. Why?

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Fire Pretty - Graz's Armoury - (That's my blog...)

The Soviet Bunker - (That's my forum...)

"Thou shalt not steal. (Because the government doesn't like competition!)"

[This message has been edited by Gee_4ce (edited August 01, 2004).]

[This message has been edited by Gee_4ce (edited August 01, 2004).]

Ok first up well done to both you and CP for getting the NINE puzzle. And with your answer to #3... close, but not quite. Remember, a level crossing is a road going ACROSS the railway...


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Fire Pretty - Graz's Armoury - (That's my blog...)

The Soviet Bunker - (That's my forum...)

"Thou shalt not steal. (Because the government doesn't like competition!)"

[This message has been edited by Gee_4ce (edited August 01, 2004).]

Whoa...too many puzzles at one time.

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Snail racing: (500 posts per line)

--------@%

The Massassi JO/JA Single Player contest info

the fifth is the big one as a whole

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Do you have stairs in your house?

[This message has been edited by Correction (edited August 01, 2004).]

CORRECT!

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Fire Pretty - Graz's Armoury - (That's my blog...)

The Soviet Bunker - (That's my forum...)

"Thou shalt not steal. (Because the government doesn't like competition!)"

7. The ol' block of ice suicide trick.

8. Divided the same way #10 is solved, into 4 triangular plots.

9. Just one. After that, his stomach is no longer empty, no matter how hungry he may be.

13. The backpack contains a parachute.

14. The tracks are on a bridge

16. He parked his car in such a way as to block, inconvenience, and 'hold up' 20 people. He left with his legal withdrawl.

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Lurker supreme.

Pete and Repeat are on a boat. Pete falls off - who's left?

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Do you have stairs in your house?

[This message has been edited by Correction (edited August 01, 2004).]

We still need solutions therefore to 3, 6, 11, 12 and 15!

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Fire Pretty - Graz's Armoury - (That's my blog...)

The Soviet Bunker - (That's my forum...)

"Thou shalt not steal. (Because the government doesn't like competition!)"

[This message has been edited by Gee_4ce (edited August 01, 2004).]

[This message has been edited by Gee_4ce (edited August 01, 2004).]

12. when they pass they're both the same distance from London Euston

Correctomundo.

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Fire Pretty - Graz's Armoury - (That's my blog...)

The Soviet Bunker - (That's my forum...)

"Thou shalt not steal. (Because the government doesn't like competition!)"