Friday Maths Problem Options

[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?

[Magik5]

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

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

[Magik5]

dvds round gfs, so cant chk

[=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

[MonkeyFiend]

Equally I didn't say the boxes explode into a rainbow of badgers - it's not damn word trickery, it a maths problem

[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) = +++++++++++++++++++++++++[>++>+++>++++>+++++<<<<-]+++++++++++++++++++++++++>>>>----.----------.++++++.<<<<+++++++.>>>---.>---.<++++.<<<.>>>++.------.>+++++++.<<<<+...

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

50% is also wrong

[=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

[MonkeyFiend]

Anyway the correct answer to my adaptation of the Monty hall problem

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) == +++++++++++++++++++++++++[>++>+++>++++>+++++<<<<-]+++++++++++++++++++++++++>>>>----.----------.++++++.<<<<+++++++.>>>---.>---.<++++.<<<.>>>++.------.>+++++++.<<<<+...

[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?

Surely if you're using the same blocks to form the same shape, then you can't have just lost some surface area?

[MonkeyFiend]

might be easier to produce the answer in the following form....

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

Fill in the blank

[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

[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!

The answer is because it's not a triangle






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!!!

[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

[Lawpf2001]

wooo I got 20

have a medal

[fido77]

i got a 13

[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.

[MonkeyFiend]

fox eats chicken eats grain

That's your idea of getting them across safely? You should work for the royal mail

[MonkeyFiend]

good to see you still on the forums dumdum

[dumdum71]

well done 6 you probably worked it out quicker than i could type it out @ monkey the forums/ shoutbox r a better read than the daily star /sun etc particularly when gunners is in full flow

[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

[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

(if you have either or both numbers negative you and up with one half being -X and the other being +X)

[fido77]

lol. that was one of my math probs today. i just put when A = B

[Magik6]

Why thank you dumdum , you've always been my fav of the SM bunch (thats right dan! )

[MonkeyFiend]

ooh forgot it was friday and time for another riddle (quick and easy one )


At the local pub, 2 fathers and 2 sons walk in and they sit down to enjoy a tasty pint of beer each. Between them they drank exactly 3 pints. Each person drank 1 pint.

How?

[fido77]

one son, one father and one grandfather. if i need to clear that up i can, but i think that sums it up pretty well!!!

[fido77]

ok, now that i got the answer up there first i'll go ahead and clarify now. the first father is the second fathers father, which makes the second father a father and son. so there is two fathers and one son. then there is the second fathers son. but nobody got drunk in the making of this math problem cause they only drank one pint each.

[MonkeyFiend]

good work and speedy too

[fido77]

i'm just cool like that

[Lawpf2001]

that was easy

[Magik6]

Almost as easy as 5

[fido77]

somebody forgot about the math problem on friday!!!!!

[Jearik]

The answer to the math problem

I did horrible probability in College

If one of 3 boxes contains fun, that means that each box has 33.33% chance of having fun

so to summarise
Box 1 = 33.33%
Box 2 = 33.33%
Box 3 = 33.33%

But wait.. monkey opens Box 3 and laughs in your face saying what now?

Box 1 still has 33.33% chance of having fun however
Box 2 is now 66.66% chance of having goodies inside why? here's the tricky semantics

Box 1 has a 33.33% chance of having goodies, which means that there is a 66.66% chance of goodies NOT being in there..
So when Box 2 and 3 where there, the probability of fun NOT being in box 1 was 66.66% split two ways into box 2 and 3...
but since box 3 is taken away then that 66.66% chance of NOT being in box 1 and being in box 2 and 3, can now be interrupted as a 66.66% chance of fun being in box 2 alone.

I hope you followed

[MonkeyFiend]

Since I couldn't think of a puzzle that people wouldn't either get straight away or cheat using goolge, I thought I'd post a link to:

http://www.deathball.net/notpron/

[Edit: reposted the above, I used the wrong address (bad memory in my old age)]

(it really isn't so should be safe to click)

solve that one then

[Magik6]

Pass

[fido77]

i couldn't click on it, so i copied and pasted the link. it has no math problem i could see, but i didn't want to allow the pop-ups. how many can prove that .999999....= 1? besides monkey of course, cause i already showed him.lol

[Magik5]

floating point numbers...?

[fido77]

not floating point numbers. just .9 repeated.

[Magik6]

how many can prove that .999999....= 1? besides monkey of course, cause i already showed him.lol

I remember this, did it ages ago.
If, 10X (= 9.999999) - X (= .999999) = 9X (= 9)

Therefore X = 1

yay for me

[kermit]

come on guys my brain doesn't operate at this time of day,

[fido77]

I remember this, did it ages ago.
If, 10X (= 9.999999) - X (= .999999) = 9X (= 9)

Therefore X = 1

yay for me

i'm not sure what kind of crap that is, but it don't look good

[Magik5]

lol

[Magik6]

How can you not follow that? Its just a simple subtraction equation consiting of two constituents which prove that .9 reccuring is another way of writting 1, so there

[fido77]

um, no its not

[Magik6]

It clearly is we need an official adjudicator

[Magik5]

if u think you no it so well why dont you give an indepth explanation instead of writing an equation (which looks like shite) where you could have copied and pasted it from anywhere, without a proof.

[Magik6]

If you start with 10X represented by the number 9.999999 and subtract 1X represented by .999999 you end up with 9X represented by the number 9. Therefore 1X = 1

If you don't follow that then you are PROPERLY RETARDED!

[fido77]

If you start with the number 9.999999 represented by 10X and subtract 1X represented by .999999 you end up with 9X represented by the number 9. Therefore 1X = 1

If you don't follow that then you are PROPERLY RETARDED!

i think that is the most retarded shit i have ever seen!!! u need to scratch that shit and start over!!!lol

[Magik5]

lol

[Magik6]

You still don't get it? if not you'd fail a bloody SATS test from year 5 or whenever you take it

[fido77]

i think you failed!!! hehe

[Magik5]

lol

[MonkeyFiend]

I remember this, did it ages ago.
If, 10X (= 9.999999) - X (= .999999) = 9X (= 9)

Therefore X = 1

yay for me

Apologies, I have a mild perpensity for OCD and therefore must make comment

Firstly only .99 RECURRING = 1
The notation should be a dot above the recurring number, but that can't be displayed in the forums, so I'll use the word 'recurring' instead

Easy Factorisation:

x = .99 recurring


10x = 9.99 recurring
10x - x = 9.99 recurring - x
9x = 9.99 recurring - .99 recurring
9x = 9

x = 1

so .99 recurring = 1

I think the above is straight forward enough to not require an explanation (so shut it 5 )

[Magik5]

lol

[fido77]

well, at least that looks better than the way 6 put it.lol. i think he was just tryin to confuse people
now i can follow that. and theres another way to do it also.

[Magik5]

for example

[fido77]

for example your momma!!!


a little easier to understand also. no need in a big long math prob.
.33recurring = 1/3
multiply both sides by 3.

[MonkeyFiend]

dedekind cuts, cauchy sequences etc., However these get into the realms of pointless nerdyness

[fido77]

nerds we are. lol

[Lawpf2001]

swear I did that in my GCSE's (age 14-16 for the yank) 2 years ago. But i wouldnt have been able to work it out though.

[Vincent Dank Gog...]

Monty hall problem, look it up. Or just click right here if you're lazy like me.

[MonkeyFiend]

Monty hall problem, look it up. Or just click right here if you're lazy like me.

necroing a post from 6 years ago. Impressive

Also the monty hall problem is great

[Porsuk]

necroing a post from 6 years ago. Impressive

Also the monty hall problem is great