Help - Search - Members - Calendar
Full Version: Friday Maths Problem
Sneaky Monkeys Forum > General > Public Discussion
Pages: 1, 2
MonkeyFiend
I'm bored, so I thought I'd annoy you with a mathematical puzzle...a nice simple one though.....

Monkeyfiend has 3 boxes: 1,2 & 3.

In one of the boxes is £1000000, the others contain something rubbish. You pick a box, say box No.1 and MonkeyFiend (who knows whats in each of the boxes), opens another box, say box 3, which contains a rubbish prize. Monkeyfiend then says do you want to pick box No.2 or stay with your original choice of box 1?

Which should you do and why?

tongue.gif
Magik5
ive seen 21 so i no the answer. i cant quite remember it tho tongue.gif

you stick with the one youve chosen, because the odds have changed (for you having the right box) to 66% because the one monkey opened has now been disgarded.
MonkeyFiend
FAIL biggrin.gif
Magik5
dvds round gfs, so cant chk tongue.gif
=R6= Raile
how long did monkeyfiend stare at the box before he opened it?
Magik5
fido77
u choose the #2 box if and only if the #1 box contained rubbish
=R6= Raile
is fido's the real answer? cuz it sounds like it could be, but also you may have just worded the OP wrong.
plus if that's the answer.... URLAME
fido77
i doubt its the answer. it doesn't say if u saw what was in box 1 when u picked it the first time.
Magik5
you havent seen inside the boxes yet, youve just picked one to be opened
MonkeyFiend
nope the original is phrased corretly I believe: you pick a box (box 1), you don't see it's contents. I show you the contents of the 3rd box (which is rubbish) - so do you stay with your first choice (box 1) or change to the remaining box (box 2)
Foxx_in_Socks
I know the answer!!! muahahahah
Magik6
You punch monkey in the face, steal both boxes and tell him to stop playing homo mind games.

Only to find monkey put rubbish in all the boxes lol
=R6= Raile
mmm the original did not say you pick a box and don't see it's contents, it simply says monkeyfiend knows whats in all the boxes. it doesnt say you cant look before you give monkey your answer tongue.gif
MonkeyFiend
Equally I didn't say the boxes explode into a rainbow of badgers - it's not damn word trickery, it a maths problem tongue.gif
Magik6
You never said we acctually pick box, just that as an example we take box one, but now i know what is in box 3. So if I took box 3 when the real option came along, allowed you to open box 1 and realise there is rubbish in both, so i would then swap my box for box number two and get my money???????

Prob wront but its the only thing i can think off
fido77
((p=>q)&(q=>r))=>(p=>r) = +++++++++++++++++++++++++[>++>+++>++++>+++++<<<<-]+++++++++++++++++++++++++>>>>----.----------.++++++.<<<<+++++++.>>>---.>---.<++++.<<<.>>>++.------.>+++++++.<<<<+... tongue.gif

there is a 50% chance that the money is in box 1 so it doesn't matter which box you choose.
MonkeyFiend
I just don't see how a uniform (t-suf) subsitution equation ((p=>q)&(q=>r))=>(p=>r) can possibly = that I am gay tongue.gif

50% is also wrong tongue.gif
=R6= Raile
if it isn't some trickery of words.. and you think it's NOT 50%, then I guess it depends on how you look at it.
The second the box #3 is revealed, and you are given a second chance to pick the right box, the odds reset themselves. you then have a 1 in 2 chance of picking the right box...
MonkeyFiend
fraid not, old chap smile.gif
MonkeyFiend
Anyway the correct answer to my adaptation of the Monty hall problem biggrin.gif

http://uk.youtube.com/watch?v=mhlc7peGlGg
fido77
p:takes it up the arse, q:sucks cock, r:likes assrammers

((p=>q)^(q=>r))=>(p=>r) == +++++++++++++++++++++++++[>++>+++>++++>+++++<<<<-]+++++++++++++++++++++++++>>>>----.----------.++++++.<<<<+++++++.>>>---.>---.<++++.<<<.>>>++.------.>+++++++.<<<<+... tongue.gif
Magik5
http://uk.youtube.com/watch?v=cXqDIFUB7YU&...feature=related

^ fo. i was right. i just got the switch thing wrong. sue me.
MonkeyFiend
here comes another one:

Magik5
cos the orange one isnt on top of the green one like it is above...
MonkeyFiend
...but how can re-arranging the blocks of the same size produce a shape that's the same as the first one but with a 1cm block missing? tongue.gif

Surely if you're using the same blocks to form the same shape, then you can't have just lost some surface area? tongue.gif
MonkeyFiend
might be easier to produce the answer in the following form....

The answer: "Because they are not ........."

Fill in the blank tongue.gif
Lawpf2001
do we need to use pythagorus' theory??
MonkeyFiend
muhahah I won't giving clues or telling the answer... except later when I get bored and write the answer tongue.gif
Cobolt
I know, I know XD (Well, I think I do, one of the maths teachers in my school showed me this)

The hypotenuse of the red triangle (and maybe the green) isn't a straight line, it curves inwards slightly.
*Hopes a fool was not just made of herself*
Lawpf2001
think your right. if you start at the top of the triangle go down 2 then left 3. look at the comparitive sizes of thse boxes
MonkeyFiend
Good Work! biggrin.gif

The answer is because it's not a triangle smile.gif






The green triangle is slightly steeper than the red

Red triangle 3 high, 8 wide = 3/8 = .375
Green triangle 2 high, 5 wide = 2/5 = .400

Difference = .25
fido77
i just saw this, and i'm too late!!! sad.gif
Lawpf2001
as its still Friday and we've sold this one ill set the next. Although, its Englush not maths. Just a spelling, grammar and general englush test. post back your scores

http://news.bbc.co.uk/1/hi/magazine/4246472.stm
MonkeyFiend
wooo I got 20 smile.gif
Lawpf2001
QUOTE(MonkeyFiend @ Feb 6 2009, 01:04 PM) *
wooo I got 20 smile.gif


have a medal
fido77
i got a 13 sad.gif
Lawpf2001
I got 15
dumdum71
a man goes 2 market and buys a chicken,a fox and some grain.on the way back home he has 2 cross a river using a fallen tree.he can onlytake one item across at a time, how does he get them all saftely over 2 the other side clue:if he takes the fox over first the chicken will eat the grain
Lawpf2001
fox eats chicken eats grain
Magik6
The man takes the chicken over first from side A to side B, then the man takes the grain over from side A to side B, when leaving side B to reurn to A he takes the chicken back with him. Once back at side A he drops off the chicken and picks up the fox, takes the fox over to side B comes back for the chicken and takes it over the river. tongue.gif
MonkeyFiend
QUOTE(Lawpf2001 @ Feb 6 2009, 04:21 PM) *
fox eats chicken eats grain


That's your idea of getting them across safely? You should work for the royal mail tongue.gif
MonkeyFiend
good to see you still on the forums dumdum biggrin.gif
dumdum71
well done 6 you probably worked it out quicker than i could type it out laugh.gif @ monkey the forums/ shoutbox r a better read than the daily star /sun etc particularly when gunners is in full flow blink.gif
Lawpf2001
oh i was convinced Gunners that did the reporting for them
MonkeyFiend
what's weird is that gunners visits the site more than ANYONE else - approx 200 visits per month - 6 times a day, but never actually looks at the forums... he only ever views the shoutbox ohmy.gif
Magik5
more then me? christ.
Lawpf2001
ooh how many times do I visit??
fido77
when is it true that A - B = B - A????
and how many times do i visit?
MonkeyFiend
when A and B are any (positive) number but both the same

I'll stick the number of visits for january up later smile.gif

(if you have either or both numbers negative you and up with one half being -X and the other being +X)
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.
Invision Power Board © 2001-2025 Invision Power Services, Inc.