Author Topic: Brain Twister need help  (Read 5526 times)

RHINO290

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Re: Brain Twister need help
« Reply #25 on: October 13, 2006, 01:01:35 PM »
Okay this might not last to long but it has to do with the gym.  Okay three guys come into the gym and wanted to train for the day.  They each only have $10. They ask the guy how much for all three of them and he say $30.  They say great and handed the guy $10 each for the $30.  They go inside and start to train.  Well the manager comes out and recognizes the guys and asked how much they paid.  The first desk guy says $30 for all three.  He says well no they live here give them a deal.  Do it for $25 he says, then tell the guy to give them $5 back.  So he goes over and hands the guys $5.  They say here dude you can keep $2. 

At the beginning it cost the guys $10 each to train.  After the refund they each got back a dollar.  So it actually cost them just $9 each.  Now add the $2 they gave the front desk guy, that adds up to $29.  What happened to the other dollar?

There is no other $1.00

They handed $2 back, making it $3. $1.00 dollar each.

haider

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Re: Brain Twister need help
« Reply #26 on: October 13, 2006, 01:02:04 PM »
LOL, the story messes up the line of thought but when u actually think abt it it goes like this:

The gym gets $30
They give back $5
This $5 amount gets redistributed between the 4 guys.
The other $25 dollars is what the gym has.
25 + 5 = 30  ;)
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Re: Brain Twister need help
« Reply #27 on: October 13, 2006, 01:04:53 PM »
That would work but it was done exactly as I said.  They each had a $10 bill.  And when the guy came back to give them somemoney back, he handed them a dollar each and he kept $2.  There was no change to give.

I don't understand why you're having such difficulty with this...  the guys paid $27 ($25 to the gym and $2 to the kid), and have three dollars in their pockets.  27+3=30

You're making your mistake when you try to add the $2 to the $27 ($9x3)...  the $2 is already included in the $27 (or the $9).
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onlyme

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Re: Brain Twister need help
« Reply #28 on: October 13, 2006, 01:17:17 PM »
LOL, the story messes up the line of thought but when u actually think abt it it goes like this:

The gym gets $30
They give back $5
This $5 amount gets redistributed between the 4 guys.
The other $25 dollars is what the gym has.
25 + 5 = 30  ;)

But when you takie actual money each guy paid ($9) that equals $27.  Now add the $2 the guy kept and it only adds up to $29.  Now why is that.  I see it done the other way but why can't it add up this way. :-\

HICKSON

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Re: Brain Twister need help
« Reply #29 on: October 13, 2006, 01:18:28 PM »
But when you takie actual money each guy paid ($9) that equals $27.  Now add the $2 the guy kept and it only adds up to $29.  Now why is that.  I see it done the other way but why can't it add up this way. :-\

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haider

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Re: Brain Twister need help
« Reply #30 on: October 13, 2006, 01:39:13 PM »
But when you takie actual money each guy paid ($9) that equals $27.  Now add the $2 the guy kept and it only adds up to $29.  Now why is that.  I see it done the other way but why can't it add up this way. :-\
hahah, dude that was exactly what I thought about after I posted my explanation.

You see when you think about it the way I explained, you're starting out with the gym having the 30 bucks. But if you go the other way around, you have to remember that the guys are starting out with a total of 30 dollars. If $27 is what they paid (25 to the gym, 2 to the kid) then the rest of the 3 bucks are in their pockets(the 3 dollars they already had).
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doison

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Re: Brain Twister need help
« Reply #31 on: October 13, 2006, 02:27:11 PM »
wow....I can't understand how you guys are getting $29. 
10x3 is 30
It was only 25, so they were given 5 back.
They each kept 1 (3), and gave 2.  So, that's 5 total, plus the 25 the gym kept = 30. 

I'm trying to make it total 29, and I can't figure out how to do it.

I was always horrible at math, so maybe you have to know how to do real math to get it wrong?
Y

haider

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Re: Brain Twister need help
« Reply #32 on: October 13, 2006, 02:29:47 PM »
wow....I can't understand how you guys are getting $29. 
10x3 is 30
It was only 25, so they were given 5 back.
They each kept 1 (3), and gave 2.  So, that's 5 total, plus the 25 the gym kept = 30. 

I'm trying to make it total 29, and I can't figure out how to do it.

I was always horrible at math, so maybe you have to know how to do real math to get it wrong?
The story does the bad math for you by adding the tip to the 27 dollars paid(=$29), when infact the tip is part of the $27 paid, with the rest of the 3 bucks in their pockets.
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Man of Steel

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Re: Brain Twister need help
« Reply #33 on: October 13, 2006, 02:36:50 PM »
I think the real question is why those 3 dumbfvcks paid $30 for a single workout?

thrain

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Re: Brain Twister need help
« Reply #34 on: October 13, 2006, 02:39:23 PM »
You see alot of quantative problems like this in b-school and especially on the GMAT exam. BTW, you should repost this using proper names instead of repeatly using pronouns (him/he).

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Re: Brain Twister need help
« Reply #35 on: October 13, 2006, 02:59:34 PM »
The same guy that didnt have the pdi shirts delieverd on time has the rest of the money.

onlyme

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Re: Brain Twister need help
« Reply #36 on: October 13, 2006, 05:36:31 PM »
You see alot of quantative problems like this in b-school and especially on the GMAT exam. BTW, you should repost this using proper names instead of repeatly using pronouns (him/he).

What the fuck are you talking about.  I can't figure out where a dollar went and you are giving me all these english lessons. ;D

The same guy that didnt have the pdi shirts delieverd on time has the rest of the money.

Now that was funny

jwb

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Re: Brain Twister need help
« Reply #37 on: October 13, 2006, 06:34:08 PM »
What the f**k are you talking about.  I can't figure out where a dollar went and you are giving me all these english lessons. ;D

Now that was funny
big man listen carefully and stop thinking too much.

the guys give the gym $30, they get back $5, so the gym gets $25 between the 3 guys. they give the kid $2 and have $3 left over between them - ie. $1 EACH...

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Re: Brain Twister need help
« Reply #38 on: October 13, 2006, 06:52:34 PM »
But when you takie actual money each guy paid ($9) that equals $27.  Now add the $2 the guy kept and it only adds up to $29.  Now why is that.  I see it done the other way but why can't it add up this way. :-\


I don't understand why you're having such difficulty with this...  the guys paid $27 ($25 to the gym and $2 to the kid), and have three dollars in their pockets.  27+3=30

You're making your mistake when you try to add the $2 to the $27 ($9x3)...  the $2 is already included in the $27 (or the $9).
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Rottmag

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Re: Brain Twister need help
« Reply #39 on: October 13, 2006, 06:52:56 PM »
I'm going back to picking lint out of my ass-crack.

A lot more enjoyable than this incongruous puzzle.

 :D

onlyme

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Re: Brain Twister need help
« Reply #40 on: October 13, 2006, 10:36:43 PM »
big man listen carefully and stop thinking too much.

the guys give the gym $30, they get back $5, so the gym gets $25 between the 3 guys. they give the kid $2 and have $3 left over between them - ie. $1 EACH...

I know how it works out that way but why doesn't it this way.  The guys each paid $10 each.  If they each get back a dollar then in reality they only paid $9 each to train which equals $27 ($9 x 3=$27).  Right?  And then the kid kept $2.  That equals only $29.

haider

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Re: Brain Twister need help
« Reply #41 on: October 13, 2006, 10:38:40 PM »
yes, onlyme is right.
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haider

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Re: Brain Twister need help
« Reply #42 on: October 13, 2006, 11:03:50 PM »
Let me be the first one to say this, Onlyme owned us all in this thread.  >:(
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jwb

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Re: Brain Twister need help
« Reply #43 on: October 13, 2006, 11:44:38 PM »
I know how it works out that way but why doesn't it this way.  The guys each paid $10 each.  If they each get back a dollar then in reality they only paid $9 each to train which equals $27 ($9 x 3=$27).  Right?  And then the kid kept $2.  That equals only $29.
No man the $9 INCLUDES the $2 tip so they only really pay $8.33 to the gym to train and 67cents each to the kid. The $3 left is their change - ie. a buck each...

onlyme

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Re: Brain Twister need help
« Reply #44 on: October 14, 2006, 11:36:59 AM »
No man the $9 INCLUDES the $2 tip so they only really pay $8.33 to the gym to train and 67cents each to the kid. The $3 left is their change - ie. a buck each...

No that is not right.  There is no change in this transaction. Only paper money.  The guys gave the gym 3 $10 bills.  The gym gave the guys back 3 $1 bills and the kid kept 2 $1 bills.  All even money no change or division. 

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Re: Brain Twister need help
« Reply #45 on: October 14, 2006, 11:49:32 AM »
That's one of my favorite old riddles. I actually tell it with 3 guys checking into a hotel...

It's semantics. There is no missing dollar. :) But if there was a missing dollar, I bet Lou Ferrigno has it.
If not him some greedy Joo who owns BB publications...
?

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Re: Brain Twister need help
« Reply #46 on: October 14, 2006, 11:52:35 AM »
No that is not right.  There is no change in this transaction. Only paper money.  The guys gave the gym 3 $10 bills.  The gym gave the guys back 3 $1 bills and the kid kept 2 $1 bills.  All even money no change or division. 

This "riddle" was posted at another board.Pretty easy.
Two ways of looking at it:

1.They each give 10$,the cashier take 25$ and put it in the cash register.
Now he got 5$ left,so he gives 1$ each and keeps 2$.
3X10=30 , 30-25=5 , 3X1+2X1=5. 30-5=25.

2.They see the sign and each pay 9$.The cashier puts 25$ into the register and got 2$ left.
Since he cant divide it between them he keeps it.
9X3=27 , 2X1=2 ,27-2=25.

Better now?

OAK

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Re: Brain Twister need help
« Reply #47 on: October 14, 2006, 12:34:12 PM »
The problem is thinking that the numbers should total $30.

Imagine that instead of $25 the actual membership cost is $10.

The front desk guy keeps $2 and gives back $18.  Then the guys paid $12, add the front desks guys money and you get $14.  Does it then make sense to ask where the missing $16 is.

The Luke

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Re: Brain Twister need help
« Reply #48 on: October 14, 2006, 03:02:03 PM »
I know how it works out that way but why doesn't it this way.  The guys each paid $10 each.  If they each get back a dollar then in reality they only paid $9 each to train which equals $27 ($9 x 3=$27).  Right?  And then the kid kept $2.  That equals only $29.

Wrong...
It still adds up to $30 even if you do it this way.

Each guy paid $10 and got back a buck. So overall each guy paid $9.
Three $9 equals $27... but that $27 INCLUDES the $2 tip (the GUYS paid the tip, not the gym)... the $27 plus the $3 the gym returned equals the original $30.

Dude, trust me... I'm  a physicist who enjoys brainteasers.

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jwb

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Re: Brain Twister need help
« Reply #49 on: October 14, 2006, 04:36:51 PM »
No that is not right.  There is no change in this transaction. Only paper money.  The guys gave the gym 3 $10 bills.  The gym gave the guys back 3 $1 bills and the kid kept 2 $1 bills.  All even money no change or division. 
keith you just answered it for yourself dude... they give the gym 3 tens, get back 5 ones and give the kid 2 ones. 30-5=25+2 for the tip and $3 left over...

they don't pay $9 to train at all they pay $25 between them which is $8.33 to train