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Riddleland!
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Lyra Cornwallis
Lyra Cornwallis
Lucky Stiff

Mar-12-2010 10:38

The game's very simple. You just have to post a riddle, and the person who posts next should try answering it, and should post their own riddle.

Example:
Why do birds fly South in winter?

Replies

Adam Carter
Adam Carter
Big Winner

Mar-17-2010 08:27

Ok, imagine it's one brick thick too then ;)

InTheShadows
InTheShadows
Old Shoe

Mar-17-2010 08:42

Right answer Adam. I'm impressed ;-)

Does the house need a floor and a roof as well?

Adam Carter
Adam Carter
Big Winner

Mar-17-2010 08:53

No, just the four walls will suffice :)

InTheShadows
InTheShadows
Old Shoe

Mar-17-2010 08:55

1520 then?

Adam Carter
Adam Carter
Big Winner

Mar-17-2010 09:19

Nope, that's wrong. You need to stop overthinking (or perhaps, start?)

Heimlich VonVictor
Heimlich VonVictor
Vigilante

Mar-17-2010 10:05

Hmm is it one? Since up until that point you're building it, but you only need one to complete it?

Adam Carter
Adam Carter
Big Winner

Mar-17-2010 10:23

Nice work Heim! Yes, you only need one brick to complete the building, the rest is just working on building it.

InTheShadows
InTheShadows
Old Shoe

Mar-17-2010 12:16

Damn! Should've seen that one...

Heimlich VonVictor
Heimlich VonVictor
Vigilante

Mar-17-2010 16:03

A young detective steps into the Prince's Palace. He has recently failed an Arch Villain Hunt and he knows that the prince is not happy with him. As he enters the room, the door slams shut behind him, and before him are three doors marked A, B, and C.

A guard motions towards the doors. "The Prince believes that your worthiness must be tested before you may attempt another hunt. Behind two of these doors are some of the Prince's most vicious tigers who have not been fed in days. The other leads to the throne room. You must choose which of these doors to open."

The detective listens carefully, trying to figure out from which of the three doors the growling is coming from, but is jnot able to.

Finally, realizing he has no other way out, the detective chooses door B. As he approaches, the guard grabs him by his arm. "Once you open it," he says, "there's no going back. I'll tell you right now that C is one of the doors that has a tiger behind it. Do you wish to change your choice?"

The detective's eyes dart from door A to B, had the guard given him any useful information? Which door should this detective pick if he wants the greatest probability of survival, and why?

Cordelia Falco
Cordelia Falco
Battered Shoe

Mar-17-2010 22:55

Ah, it's the car and goats problem! I've had many a pub argument over this one!

To have the greatest chance of finding the throne room, he should change his choice.


For the first choice, there's an chance of 1 in 3 of picking the right door. But once the guard tells him where a tiger is, things change. It's more likely that the detective has picked a tiger than that he's picked a throne room: he had 2 in 3 chances of choosing a tiger door. If he's picked a tiger, then the guard has just told him where the other tiger is, so changing his choice will get him the throne room. It's only if he's picked the throne room that he's wrong to change. So 2 out of 3 times he should change, and only 1 out of 3 times he shouldn't.

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