: And you thought you were smart...(brain twisters)


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JoeSoap
2007-01-11, 05:51 PM
2 dogs.

99gecko
2007-01-11, 05:55 PM
sorry :eek:
here's a hint (actually not so much of one):

there's also a red herring in the question.....:confused:

I will post the answer tomorrow if no one gets it by then.
cheers,

JoeSoap
2007-01-11, 06:00 PM
4. There were too many two's in the question and I had finger trouble when I meant to say 4.

99gecko
2007-01-11, 06:05 PM
Well Done Joe Soap!

Now for a tougher one:

A man kills his wife. Many people watch him doing so.

Yet no one will ever be able to accuse him of murder. Why?

cheers,
99gecko

99gecko
2007-01-11, 06:09 PM
solution for the dogs puzzle (since Joe Soap is so smart)


shape of room is irrelevant. 4 dogs are arranged as follows:

1 2
3 4

Cyclism
2007-01-11, 06:42 PM
99gecko:

Because the man is a doctor who botched the surgery on his wife and she died on the Operating Table

99gecko
2007-01-11, 11:49 PM
sorry :(
Amazing! that is exactly what I guessed 1st time as well! But I think you could imagine circumstances in your scenario where doubt could cause someone to "accuse" him of murder.
For the answer to this riddle, there could never be any accusations.

cheers!

Q
2007-01-12, 12:09 AM
because it is a tv show or movie

I miss read the ball question. I read it up. stop. another direction. then another direction towards you.

I got the 4 dogs.

Here is another one.

Join the * with 4 straight lines without lifting the marking device. the dots are just for spaces.

*................*................*



*................*................*



*................*................*

BundyBear
2007-01-12, 12:21 AM
Because the husband is an executioner and the wife was sentenced to the death penalty.........:cool:

pjreid
2007-01-12, 01:07 AM
1 ......... 2 ......... 3
.
.
.
4 ......... 5 ......... 6
.
.
.
7 ......... 8 ......... 9


If we label the vertices as shown, then we would draw a line from
7, through 4, to 1 (actually a little higher than 1); the second line goes from the point above 1 diagonally through 2 and 6, to a point parallel to the 7-8-9 line. The next line goes back through 9,8, and 7. The next line goes from 7, through 5 and 3.

Q
2007-01-12, 01:11 AM
well done pjreid.

if your still online or for next time use the spoiler tags to give others a chance.

[spoiler]your text goes here[/spoiler.] without the dot at end of 2nd one.

99gecko
2007-01-12, 10:17 AM
Happy Friday All,

Q, great guess, but sorry.

BundyBear, you are correct. As Q mentioned above try using spoiler tags so as to keep the answer hidden for others.

I will try and post another this afternoon if I get time to dig for them!

cheers,
99gecko

99gecko
2007-01-12, 03:36 PM
This answer to this one stumped me.
Let me preface this brain teaser, by stating that it is a well published one that caused a lot of controversy amongst intellectuals (does that sound like Q's plane question??). At first mathematicians couldn't agree - The Mensa monthly journal wrote an article about it, then retracted the article a month later. I'm not posting this one to stir upcontroversy but rather to stimulate a mind.

I have changed certain key words to challenge those who would rather just search for the answer on the net.

You're a participant on a game show called "Mystery Box". The game is very simple. There are three boxes: box #1, box #2, and box #3. In one box is a million dollars. The other two boxes contain joke prizes. All you have to do is pick which box you want to open, and you get whatever is in it. But you only get to open one box. By simple math, then, you obviously have a 1 in 3 chance of picking the correct box and becoming an instant millionaire.

You pick a box. As soon as you tell Howie Mandel (the gameshow host) what box you want to open, he stops and says, "Okay, you've made your selection. Now, I'm going to do what we always do here on "Mystery Box". I'm going to open one of the other two boxes for you that I know has a joke prize." And he does so. Then he asks, "Okay, would you like to stay with your original guess, or would you like to switch to the other box that's still closed? You only get one shot, so do you want to stay with your original choice, or switch?"

Here's the question: is there any compelling reason to switch boxes?

To be clear, there is no trickery, and Howie is not cheating. Furthermore, the money has not moved, will not be moved, and if you open the right box, you win the cash. Money is either in the box you first picked, or in the remaining unopened box. Should you change your choice?



Happy Friday All,
99gecko

Q
2007-01-12, 03:47 PM
you will have a 66.67% chance of winning by switching boxes. I would switch every time.

pjreid
2007-01-12, 03:51 PM
Here's my answer to "Mystery Box"

To me the answer is blindingly obvious: there's an exactly 50/50 chance of you picking the right box. The third box is essentially a red herring--since it has no factor in the final outcome--one non-winning box will always be eliminated before your final choice. There is no compelling reason to change your choice whatsoever. Not sure why there was any controversy over this one at all

pjreid
2007-01-12, 03:53 PM
Q - care to explain your answer?

I don't see how you have a 66.67% chance of winning at all--all that's happened is a non-winning box has been revealed. There's still just as much chance that the one you picked is the correct box as there is that the other box is the correct one. The odds are dead-on 50:50.

Q
2007-01-12, 03:57 PM
controversy already.

I have a very simple way to prove it but will leave it alone for now.

99gecko
2007-01-12, 04:05 PM
Q - care to explain your answer?
pjreid, How about if I give you the weekend to change your answer..... :D , then I'll post the solution if no one objects

cheers,
99gecko

pjreid
2007-01-12, 04:07 PM
I'm standing by my answer ;)

Q
2007-01-12, 04:40 PM
to me. 3 doors ea. door is 33.3% chance. Once you have chosen a door the other two doors are a 66.7% chance of being right. Therefore by eliminating one of them your chances are still 66.7% Maybe an easier way to think about it is this: 10 doors. Pick a door which would be 10% chance. The other 9 are 90%. Monty Hall removes 8 wrong doors leaving one door and yours. Is it easier to see now that your chances are better? Mathematically because you know there were 3 doors it is impossible to be 50-50 unless he showed the wrong door BEFORE you choose your door.