Solve this simple math problem (you may not get it right :D)

[Jubei]

I don't get this. Maybe that's why I sucked at maths.

 

[GlendaleViper]

Quote:

Originally Posted by JahJahBinks That reminds me this problem: Three people decide to stay at a hotel at a rate of $100 per night, so they paid $300 total. The next day hotel owner realized he made a mistake on the price and returned $50 to them. However guy working at the counter only returned $30 to them, and put the rest $20 in his own pocket. So now each of the three people got $10 back, which means each only paid $90, total $270. But when you add that money to the $20 they suppose to get too, that's only $290, where is the missing $10?

Exactly what I was thinking of...


...though both of these questions make my brain hurt.

 

[m_memmory]

Quote:

Originally Posted by chesebert This is what I replied in my PM to Zenith "The answer is $100 $90 from the loss (substantive loss) $10 from loss by lost profit (lost volume doctrine, since the headphone shop has an infinite supply of headphones if he sold the headphone to anyone else he would have made $10). You may also call this opportunity cost, but its really lost profit or lost volume to be precise. "

Then I got it right in post #20!!

Quote:

Originally Posted by m_memmory 2nd attempt then... Basically your neighbour has given you $100 and you've given her $100 so that evens out. The customer has basically taken the headphone (that you brought for $80) and $10 as well. So either your down $90 (the $80 for the headphone plus their $10 "change") Or maybe $100 (the $90 you were selling it for plus their $10 "change") Or maybe (as a headphone dealer) you totally write off the costs of the headphone in amongst normal day to day running costs so your only $10 out of pocket. Or (alternatively) your not down anything as you've got the $100 "fake" and you can claim the actual cash back from somewhere or other ???

So... what do I win??

 

[m_memmory]

Quote:

Originally Posted by JahJahBinks That reminds me this problem: Three people decide to stay at a hotel at a rate of $100 per night, so they paid $300 total. The next day hotel owner realized he made a mistake on the price and returned $50 to them. However guy working at the counter only returned $30 to them, and put the rest $20 in his own pocket. So now each of the three people got $10 back, which means each only paid $90, total $270. But when you add that money to the $20 they suppose to get too, that's only $290, where is the missing $10? Problems like this one and the one stated in this thread have made great interview questions

I was able to answer this question once - but it's way too late (or early!) in the morning for me to be able to work out what the answer is or remember what I said (it's past 1am where I am!! lol)

 

[hYdrociTy]

Quote:

Originally Posted by JahJahBinks That reminds me this problem: Three people decide to stay at a hotel at a rate of $100 per night, so they paid $300 total. The next day hotel owner realized he made a mistake on the price and returned $50 to them. However guy working at the counter only returned $30 to them, and put the rest $20 in his own pocket. So now each of the three people got $10 back, which means each only paid $90, total $270. But when you add that money to the $20 they suppose to get too, that's only $290, where is the missing $10? Problems like this one and the one stated in this thread have made great interview questions

The three now have to pay 300-(50-20)= 270. They each put down 90. They thus saved 10 dollars each.

How does adding 20 dollars to 270 supposed to be equal to 300 anyway? its taking the 20 from another frame of reference and applying it at a time when its not appropriate.

Actually to put it simply, think of tax.

If you would like to freeze time at that frame you suggested, then tThe ONLY way to look at the money chain is like this:

300 = 250(Actual price) + 20(stolen) + 30(wronfully charged)
250=90 + 90 + 90 -20(stolen)

SO
The 90 dollars actually INCLUDES the SHAFT TAX

how can you go 300 = 90+90+90 + 20? see how that doesnt work out? 300=past. 90 = future. 10 didnt dissapear. It Appeared in the hotel patrons bill.. pwned

WHY??? BEACUSE ITS NOT 300! The owner got 250! 10 went to each patrons pocket, and 20 went into the shafting employee! There IS no 300! No one ever got 300.. IF there was no shaft, the patrons would have paid 250/3 BUT they now pay (250+20)/3

see??

 

[Xanatos]

Quote:

Originally Posted by JahJahBinks That reminds me this problem: Three people decide to stay at a hotel at a rate of $100 per night, so they paid $300 total. The next day hotel owner realized he made a mistake on the price and returned $50 to them. However guy working at the counter only returned $30 to them, and put the rest $20 in his own pocket. So now each of the three people got $10 back, which means each only paid $90, total $270. But when you add that money to the $20 they suppose to get too, that's only $290, where is the missing $10? Problems like this one and the one stated in this thread have made great interview questions

So the problem with the question has something to do with adding $20 to $270 instead of subtracting?

 

[philodox]

Quote:

Originally Posted by JahJahBinks Three people decide to stay at a hotel at a rate of $100 per night, so they paid $300 total. The next day hotel owner realized he made a mistake on the price and returned $50 to them. However guy working at the counter only returned $30 to them, and put the rest $20 in his own pocket. So now each of the three people got $10 back, which means each only paid $90, total $270. But when you add that money to the $20 they suppose to get too, that's only $290, where is the missing $10?

The following night two people check into the same motel. Once again they get charged $300, or $150 per person. After the hotel owner remembers the total rate is only $250 he sends the guy at the counter upstairs with five $10 bills to pay them both back. The thief knows he got away with it once so he tries it again, but this time he pockets $30 and returns $20 to the people [$10 each]. They recieved $10 a piece from their original $150 which means they each paid $140 for a total of $280. Now the guy working the counter has $30, and the people paid $280 for a total of $310...

There's your missing ten bucks.

 

[hYdrociTy]

yea edited my prev post to make it easier to understand..

 

[Kirosia]

why is 6 afraid of 7?

[size=xx-small]if you don't know this, then you musta been livin' under a rock[/size]

 

[JahJahBinks]

I would ask this kind of question when I become a interviewer.

 

[hYdrociTy]

Quote:

Originally Posted by Kirosia why is 6 afraid of 7? [size=xx-small]if you don't know this, then you musta been livin' under a rock[/size]

Because seven wears black with brown, overalls, dock martins, or skinny pants when he/she is not skinny at all.

 

[philodox]

Because seven ate nine!

tee-hee!

 

[Kirosia]

I actually have a more offensive variation of the answer, but I'd probably get in trouble if I say it.

Quote:

Because seven wears black with brown, overalls, dock martins, or skinny pants when he/she is not skinny at all.

Why would anyone find that scary?

 

[will75]

I took some time on this and came up with the guy being in the black by $327 canadian.

 

[Head Creep]

Quote:

Originally Posted by Kirosia why is 6 afraid of 7?

Because 7 shot a man in Reno just to watch him die?