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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

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.

Heimlich VonVictor
Heimlich VonVictor
Vigilante

Mar-18-2010 00:02

Yes that is correct Cordelia! Although I'm sure others will argue it with you :)

Cordelia Falco
Cordelia Falco
Battered Shoe

Mar-18-2010 08:14

Well, if they buy me a pint they can argue all they like! :D

Talia Rune
Talia Rune
Nomad

Mar-18-2010 08:59

Three young detectives decide that just once they want to have their fortune read to them, not for a case but just for fun.

They go to see Thomas Lee, the fortune teller, and he offers them to buy the basic $20 reading, a reading that included a little more personal information in a $40 reading or a full in-depth fortune telling for $50.

The first detective steps up and hands him a $50 bill.
Thomas asks "would you like the $20, the $40 or the $50 reading?"
"The $50 reading" the detective replies, which Thomas delivers.

After that first reading, the second detective steps up and also hands Thomas the $50.
Thomas asks "would you like the $20, the $40 or the $50 reading?"
"The $50 reading" the detective replies, which Thomas delivers.

Now the third detective steps up to Thomas and hands him $50.
Thomas immediately commences with the $50 reading.

Why didn't the fortune teller ask the third detective which reading to give?

ctown28
ctown28
Huntsman

Mar-18-2010 10:28

Ahh, the old Monty Hall paradox! I remember having arguments about that one as well. It's all a matter of perspective, there is even a wiki page about it.

http://en.wikipedia.org/wiki/Monty_Hall_problem

As far as the fortune teller question:

The first two paid with $50 bills so the fortune teller needed to know if change needed to be made, whereas the last detective paid with smaller bills so no change would have been needed to be made (i.e. 2 $20 bills and a $10 bill), that is how the fortune teller knew.

I'll try to come up with one to put on hear today!

Lyra Cornwallis
Lyra Cornwallis
Lucky Stiff

Mar-18-2010 11:25

That was a clever one for sure, to me...

What does not m0ve when it is born?

Lyra Cornwallis
Lyra Cornwallis
Lucky Stiff

Mar-19-2010 10:26

Does anybody know?

Cordelia Falco
Cordelia Falco
Battered Shoe

Mar-19-2010 10:41

Nope, I'm drawing a blank on that one!

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