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Author Topic: Can you solve this mathematical mystery?  (Read 7318 times)
cyrus buelton
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« on: May 27, 2008, 07:17:24 AM »

Three businessmen decide to get a hotel for the night. They are told by the inn keeper the cost is 30$ for the room. They each pay the inn keeper with a 10$ bill.

The inn keeper then realizes the hotel room is only 25$ and  he has over charged the men, but is not sure how to refund the money the money based on the amount and it being among 3 people.

So he decided to give each man a dollar back (3 total) and keep 2$ for himself. This adds up to the 5$ refund.

However, explain this:

Each man paid 9$ and the inn keeper kept 2$


9 x 3 = 27
Innkeep = 2

That is 29.



Where the make the beast with two backs is the other dollar?
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SacDuc
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« Reply #1 on: May 27, 2008, 07:20:06 AM »



I was told there would be no math.

sac
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« Reply #2 on: May 27, 2008, 07:20:49 AM »

Three businessmen decide to get a hotel for the night. They are told by the inn keeper the cost is 30$ for the room. They each pay the inn keeper with a 10$ bill.

The inn keeper then realizes the hotel room is only 25$ and  he has over charged the men, but is not sure how to refund the money the money based on the amount and it being among 3 people.

So he decided to give each man a dollar back (3 total) and keep 2$ for himself. This adds up to the 5$ refund.

However, explain this:

Each man paid 9$ and the inn keeper kept 2$


9 x 3 = 27
Innkeep = 2

That is 29.



Where the make the beast with two backs is the other dollar?
The innkeeper actually kept $27 ($25 for the room plus $2 extra). The salesmen kept $3. $27 plus $3 = $30
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cyrus buelton
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« Reply #3 on: May 27, 2008, 07:24:56 AM »

The innkeeper actually kept $27 ($25 for the room plus $2 extra). The salesmen kept $3. $27 plus $3 = $30

Right, I am aware of that.

However, the men each got back 1$, so each had paid 9$.


9 x 3 = 27


The inn keeper kept 2 dollars.



The math does not add up when you do it on paper.
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« Reply #4 on: May 27, 2008, 07:28:38 AM »

So he decided to give each man a dollar back (3 total) and keep 2$ for himself. This adds up to the 5$ refund.

no it is a 3 dollar refund

he is failing to give the men their 66.6 cents

because he is a make the beast with two backsing thief
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SacDuc
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« Reply #5 on: May 27, 2008, 07:35:39 AM »

Right, I am aware of that.

However, the men each got back 1$, so each had paid 9$.


9 x 3 = 27


The inn keeper kept 2 dollars.


(
The math does not add up when you do it on paper.



Okay, fine then.

((30 - 3)/3) -2     + 3       +2     =     30
 Room Cost       Refund    Kept        Total
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DucLeone
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« Reply #6 on: May 27, 2008, 07:35:57 AM »

Right, I am aware of that.

However, the men each got back 1$, so each had paid 9$.


9 x 3 = 27


The inn keeper kept 2 dollars.



The math does not add up when you do it on paper.
the 2 dollar tip is part of the 27
27-25(room)=2 tip
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« Reply #7 on: May 27, 2008, 07:37:46 AM »

This is a case of misdirection. The two dollars should be subtracted, not added, from the total:
($10 - $1) x 3 - $2 = $25
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SacDuc
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« Reply #8 on: May 27, 2008, 07:39:33 AM »

This is a case of misdirection. The two dollars should be subtracted, not added, from the total:
($10 - $1) x 3 - $2 = $25

+1


Wait. That would make it $26. Now I'm confused. When is recess?
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« Reply #9 on: May 27, 2008, 07:48:14 AM »

$30-$5=$25
$25/3=$8.3333
$8.3333+1=$9.33333
$9.3333*3=$28.00
$28.00+2=$30

the flaw is using 30-3 to signify the refund.  the refund is $5 and innkeeper is stealing $2 of it.

Thus, the charge to the biznizmen is $8.333- which is $25 total (yes, one of them is on the hook for 0.3334 cents).  Add the dollar refund that they DID receive back in and you have $28 (27.99999) now add the stolen $2 in and you have $30 (29.99999)
« Last Edit: May 27, 2008, 07:56:15 AM by ducatizzzz » Logged

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« Reply #10 on: May 27, 2008, 07:50:23 AM »

$30-$5=$25
$25/3=$8.3333
$8.3333+1=$9.33333
$9.3333*3=$28.00
$28.00+2=$30


Huh?  What is the +1?
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« Reply #11 on: May 27, 2008, 07:51:40 AM »


Huh?  What is the +1?
The refund....
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SacDuc
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« Reply #12 on: May 27, 2008, 07:53:50 AM »

The refund....


Ah. Got it. I'm dumb. But I have to say, this is the best tasting paste I have ever eaten.

sac
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« Reply #13 on: May 27, 2008, 07:53:59 AM »

three guys on a business trip, in a cheap motel  Roll Eyes

the other dollar went towards lube
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SacDuc
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« Reply #14 on: May 27, 2008, 07:57:20 AM »

three guys on a business trip, in a cheap motel  Roll Eyes

the other dollar went towards lube

Anal?
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