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Math problem

This is a discussion on Math problem within the Informix forums, part of the Database Server Software category; --> Three guys in a hotel call room service and order two large pizzas. The delivery boy brings them up ...


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  #1 (permalink)  
Old 04-19-2008, 07:46 PM
Dirk Moolman
 
Posts: n/a
Default Math problem



Three guys in a hotel call room service and order two large pizzas.
The delivery boy brings them up with a bill for exactly $30.00.
Each guy gives him a $10.00 bill, and he leaves.

That's fact!

When he hands the $30.00 to the cashier, he is told a mistake
was made. The bill was only $25.00, not $30.00.
The cashier gives the delivery boy five $1.00 bills and tells him to
take it back to the 3 guys who ordered the pizza.

That's fact!

On the way back to their room, the delivery boy has a thought...

these guys did not give him a tip. He figures that since
there is no way to split $5.00 evenly three ways anyhow,
he will keep two dollars for himself and give them back three dollars.
OK! So far so good!

He knocks on the door and one fellow answers.
He explains about a mix up in the bill, and hands he
guy the three dollars, then departs with his two-dollar tip in his pocket.



-------------------------------------------------------------------------



Now the fun begins!

Remember $30-$25=$5 Right? $5-$3=$2 Right?

So what's the problem?
All is well, right?
Not quite. Answer this:

Each of the three guys originally gave $10.00 each.
They each got back $1.00 in change.
That means they paid $9.00 each,
which times three is $27.00.
The delivery boy kept $2.00 for a tip.
$27.00 plus $2.00 equals $29.00.
Where the hell is the other dollar ??????????

sending to informix-list
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  #2 (permalink)  
Old 04-19-2008, 07:46 PM
Gorazd Hribar Rajterič
 
Posts: n/a
Default Re: Math problem

> $27.00 plus $2.00 equals $29.00.
> Where the hell is the other dollar ??????????
>


$27.00 *minus* $2.00 equals $25.00...


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  #3 (permalink)  
Old 04-19-2008, 07:46 PM
Andy Lennard
 
Posts: n/a
Default Re: Math problem

In message <bk6k70$bv3$1@terabinaries.xmission.com>, Dirk Moolman
<DirkM@mxgroup.co.za> writes
>
>
>Three guys in a hotel call room service and order two large pizzas.
>The delivery boy brings them up with a bill for exactly $30.00.
>Each guy gives him a $10.00 bill, and he leaves.
>
>That's fact!
>
>When he hands the $30.00 to the cashier, he is told a mistake
>was made. The bill was only $25.00, not $30.00.
>The cashier gives the delivery boy five $1.00 bills and tells him to
>take it back to the 3 guys who ordered the pizza.
>
>That's fact!
>
>On the way back to their room, the delivery boy has a thought...
>
>these guys did not give him a tip. He figures that since
>there is no way to split $5.00 evenly three ways anyhow,
>he will keep two dollars for himself and give them back three dollars.
>OK! So far so good!
>
>He knocks on the door and one fellow answers.
>He explains about a mix up in the bill, and hands he
>guy the three dollars, then departs with his two-dollar tip in his pocket.
>
>
>
>-------------------------------------------------------------------------
>
>
>
>Now the fun begins!
>
>Remember $30-$25=$5 Right? $5-$3=$2 Right?
>
>So what's the problem?
>All is well, right?
>Not quite. Answer this:
>
>Each of the three guys originally gave $10.00 each.
>They each got back $1.00 in change.
>That means they paid $9.00 each,
>which times three is $27.00.
>The delivery boy kept $2.00 for a tip.
>$27.00 plus $2.00 equals $29.00.


yes, but more relevant, 27 - 2 = 25

>Where the hell is the other dollar ??????????
>
>sending to informix-list


paid out 3x10 = 30
actual cost = 25
change = 5
refund per guest = 1
kept by boy = 2
Total paid by guests = 3x(10-1) = 27
27 - 2 = 25

3x10 = <pizza> + 5
3x(10-1) = <pizza> + 2
--
Andrew Lennard andy@kontron.demon.co.uk
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  #4 (permalink)  
Old 04-19-2008, 07:48 PM
Art S. Kagel
 
Posts: n/a
Default Re: Math problem

On Tue, 16 Sep 2003 04:43:33 -0400, Dirk Moolman wrote:

That's an old one. Kept my kids going for days. However, it only works
verbally when you can batter the poor victim over and over that:

"$25 + $2 does not equal $30, so where's the missing dollar?"

Looks like everyone got it.

Art

> Three guys in a hotel call room service and order two large pizzas. The
> delivery boy brings them up with a bill for exactly $30.00. Each guy gives him
> a $10.00 bill, and he leaves.
>
> That's fact!
>
> When he hands the $30.00 to the cashier, he is told a mistake was made. The
> bill was only $25.00, not $30.00. The cashier gives the delivery boy five
> $1.00 bills and tells him to take it back to the 3 guys who ordered the pizza.
>
> That's fact!
>
> On the way back to their room, the delivery boy has a thought...
>
> these guys did not give him a tip. He figures that since there is no way to
> split $5.00 evenly three ways anyhow, he will keep two dollars for himself and
> give them back three dollars. OK! So far so good!
>
> He knocks on the door and one fellow answers. He explains about a mix up in
> the bill, and hands he guy the three dollars, then departs with his two-dollar
> tip in his pocket.
>
>
>
> -------------------------------------------------------------------------
>
>
>
> Now the fun begins!
>
> Remember $30-$25=$5 Right? $5-$3=$2 Right?
>
> So what's the problem?
> All is well, right?
> Not quite. Answer this:
>
> Each of the three guys originally gave $10.00 each. They each got back $1.00
> in change.
> That means they paid $9.00 each,
> which times three is $27.00.
> The delivery boy kept $2.00 for a tip.
> $27.00 plus $2.00 equals $29.00.
> Where the hell is the other dollar ??????????
>
> sending to informix-list

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  #5 (permalink)  
Old 04-19-2008, 07:52 PM
Marjana Marussig
 
Posts: n/a
Default Re: Math problem

Child's play...


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