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Maths Mystery... Unsolvable????? ( Archived) (88)

Sep 29, 2008 7:50 AM CST Maths Mystery... Unsolvable?????
Enduro
EnduroEnduroLaunceston, Tasmania Australia18 Threads 467 Posts
Recently I was given a scenario by the GM of an engineering company
with an example where there is no mathematical solution possible.

What do you think?


Scenario is this:

3 men rent a room costing $40

However the caretaker charges them $20 each so $60.

But then he feels guilty and gives each man back $5
So he gave back $15 and he keeps $5 for himself.

Now the men after getting back $5 each really paid
$45 for the room plus the $5 kept by the caretaker is only $50.

BUT the caretaker started with $60.

So where is the missing $10?

Who has it and where did it go????



uh oh moping
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Sep 29, 2008 8:06 AM CST Maths Mystery... Unsolvable?????
Enduro
EnduroEnduroLaunceston, Tasmania Australia18 Threads 467 Posts
If you think that you have an answer then please let me know in the next day or two,

because I will not be booking in to anymore hotels with such dodgy caretakers.

I just can't take the risk.dunno frustrated










sigh uh oh wave
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Sep 29, 2008 8:06 AM CST Maths Mystery... Unsolvable?????
crotalus_p
crotalus_pcrotalus_pRush, Dublin Ireland57 Threads 7 Polls 3,812 Posts
Enduro: Recently I was given a scenario by the GM of an engineering company
with an example where there is no mathematical solution possible.

What do you think?


Scenario is this:

3 men rent a room costing $40

However the caretaker charges them $20 each so $60.

But then he feels guilty and gives each man back $5
So he gave back $15 and he keeps $5 for himself.

Now the men after getting back $5 each really paid
$45 for the room plus the $5 kept by the caretaker is only $50.

BUT the caretaker started with $60.

So where is the missing $10?

Who has it and where did it go????


Your math is wrongroll eyes
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Sep 29, 2008 8:09 AM CST Maths Mystery... Unsolvable?????
crotalus_p
crotalus_pcrotalus_pRush, Dublin Ireland57 Threads 7 Polls 3,812 Posts
60-40 for room =20 -5for caretaker = 15 -(5x3 what was given back)= 0 no missing money
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Sep 29, 2008 8:09 AM CST Maths Mystery... Unsolvable?????
Enduro
EnduroEnduroLaunceston, Tasmania Australia18 Threads 467 Posts
crotalus_p: Your math is wrong



How so?confused

Please explain. Thanks.professor
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Sep 29, 2008 8:13 AM CST Maths Mystery... Unsolvable?????
Enduro
EnduroEnduroLaunceston, Tasmania Australia18 Threads 467 Posts
crotalus_p: 60-40 for room =20 -5for caretaker = 15 -(5x3 what was given back)= 0 no missing money


Well done you are spot on!

That was exactly my calculation that in fact there never was
an extra $10 therefore nothing is missing!

You are very good at maths most people were completely
bamboozled including this GM.

Well done. thumbs up
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Sep 29, 2008 8:14 AM CST Maths Mystery... Unsolvable?????
bodleing
bodleingbodleingGreater Manchester, England UK270 Threads 9 Polls 18,384 Posts
I dont see a problem with this


Paid 60.00

Refund 15.00

Com 5.00 Balance 40.00



dunno
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Sep 29, 2008 8:21 AM CST Maths Mystery... Unsolvable?????
Barnagie
BarnagieBarnagieWarsaw, Mazovia Poland35 Threads 3 Polls 988 Posts
Crotalus has right.
60-40=20
20=3 guys * 5 $ + 5 $ for caretaker = 15$+5$=20$

You must remember that they paid 45 $ for room which costs 40$ so caretaker took his 5$ from this excess payment.

No 10$ missing.
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Sep 29, 2008 8:22 AM CST Maths Mystery... Unsolvable?????
Enduro
EnduroEnduroLaunceston, Tasmania Australia18 Threads 467 Posts
bodleing: I dont see a problem with thisPaid 60.00

Refund 15.00

Com 5.00 Balance 40.00


The misconception that most people had was the payment
of $45 plus the $5 added up to only $50 yet the caretaker
started with $60.

So the perception of a missing $10.

But your conclusion was correct so well done to you too.thumbs up
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Sep 29, 2008 8:23 AM CST Maths Mystery... Unsolvable?????
kayrachelle
kayrachellekayrachelleElkhart, Indiana USA2 Threads 125 Posts
so, i looked at this problem.
and solved it in my head.
not to brag or anything.
im just saying.
musta been the adv calculus i took my junior year.
hahaha.

anymore?
this was fun.
rolling on the floor laughing
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Sep 29, 2008 8:24 AM CST Maths Mystery... Unsolvable?????
mastic55
mastic55mastic55Long Island, New York USA217 Threads 10,073 Posts
So he gave back $15 and he keeps $5 for himself.(He keeps 15 for himself) 40 room
60 to caretaker.
15 given back.
45 caretaker keeps.

40 for room. 6o extra to care taker, care taker gives back 15 and keeps 45 for himself.
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Sep 29, 2008 8:26 AM CST Maths Mystery... Unsolvable?????
mastic55
mastic55mastic55Long Island, New York USA217 Threads 10,073 Posts
They should beat the shit out of the caretaker.tongue
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Sep 29, 2008 8:29 AM CST Maths Mystery... Unsolvable?????
bodleing
bodleingbodleingGreater Manchester, England UK270 Threads 9 Polls 18,384 Posts
mastic55: They should beat the shit out of the caretaker.



rolling on the floor laughing rolling on the floor laughing rolling on the floor laughing
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Sep 29, 2008 8:30 AM CST Maths Mystery... Unsolvable?????
mastic55
mastic55mastic55Long Island, New York USA217 Threads 10,073 Posts
cheers cheers thumbs up
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Sep 29, 2008 8:30 AM CST Maths Mystery... Unsolvable?????
Enduro
EnduroEnduroLaunceston, Tasmania Australia18 Threads 467 Posts
kayrachelle: so, i looked at this problem.
and solved it in my head.
not to brag or anything.
im just saying.
musta been the adv calculus i took my junior year.
hahaha.

anymore?
this was fun.




Well done.

My God CS is full of maths geniuses!!professor

Ok so you want more??laugh

There is another but I am tying to find it
it is here somewhere I think.dunno confused
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Sep 29, 2008 8:31 AM CST Maths Mystery... Unsolvable?????
mastic55
mastic55mastic55Long Island, New York USA217 Threads 10,073 Posts
Enduro: Recently I was given a scenario by the GM of an engineering company
with an example where there is no mathematical solution possible.

What do you think?


Scenario is this:

3 men rent a room costing $40

However the caretaker charges them $20 each so $60.

But then he feels guilty and gives each man back $5
So he gave back $15 and he keeps $5 for himself.

Now the men after getting back $5 each really paid
$45 for the room plus the $5 kept by the caretaker is only $50.

BUT the caretaker started with $60.

So where is the missing $10?

Who has it and where did it go????
It's not the math, it the shifting of words.
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Sep 29, 2008 8:35 AM CST Maths Mystery... Unsolvable?????
bodleing
bodleingbodleingGreater Manchester, England UK270 Threads 9 Polls 18,384 Posts
Enduro: Well done.

My God CS is full of maths geniuses!!

Ok so you want more??

There is another but I am tying to find it
it is here somewhere I think.


Just in the middle of doing my VAT return.

Enough math for one day for me I think!!!


laugh
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Sep 29, 2008 8:35 AM CST Maths Mystery... Unsolvable?????
kayrachelle
kayrachellekayrachelleElkhart, Indiana USA2 Threads 125 Posts
Enduro: Well done.

My God CS is full of maths geniuses!!

Ok so you want more??

There is another but I am tying to find it
it is here somewhere I think.



find it.
haha, im bored.
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Sep 29, 2008 8:57 AM CST Maths Mystery... Unsolvable?????
Enduro
EnduroEnduroLaunceston, Tasmania Australia18 Threads 467 Posts
kayrachelle: find it.
haha, im bored.


Ok young lady I have found it.professor

But when you have your answer please DO NOT tell me
as the task for me is that I have to tell you what answer you came up with.

So please just let me know when you have an answer and
I will then tell you what I think it is. OK?



Ok everybody here it is:

Just think of a number between 1-9

Now multiply it by 9

then add the 2 digits

And minus 5 from the result. OK?

Now assign the number you have with a letter:
A=1
B=2
C=3
D=4 etc

Ok now think of a country starting with the letter you have.

Also think of an animal with the 2nd letter of the country you thought of. OK

Now please let me know if you have an answer and I wil attempt
to predict exactly what it is.









dancing
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Sep 29, 2008 9:01 AM CST Maths Mystery... Unsolvable?????
Enduro
EnduroEnduroLaunceston, Tasmania Australia18 Threads 467 Posts
mastic55: They should beat the shit out of the caretaker.




That is in caretaker management 101professor








laugh wave
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by Enduro (18 Threads)
Created: Sep 2008
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