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A tricky Math(s) problem
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Mar 30, 2022 18:44:11   #
Reuss Griffiths Loc: Ravenna, Ohio
 
After he buys and sells the goat and makes a $10 profit, that transaction is now moot and not connected to any past or furture transactions. He now buys that goat or another goat for $80 and sells it for $90 and makes another $10. So he has no goats and $20 in his pockets but the experience gained is priceless. Anybody out there buying second-hand goats? I've got a deal for you.

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Mar 30, 2022 18:51:32   #
BebuLamar
 
Dannj wrote:
He ends up with $20 more than he started with no matter how you look it. Call it a “gain”, call it “more”, call it “profit”. He’s up $20.


Yes and that's why he got $20 profit. The fact that the second time he bought for more money than the first is irrellevant because it could be another item altogether and he made $10 on it.

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Mar 30, 2022 19:31:32   #
SteveR Loc: Michigan
 
David in Dallas wrote:
I agree. The two transaction pairs are separate events.


David, my grandson is in the sixth grade in Fate (near Rockwall) and studying for the Starr test. If I put some of the questions in the study booklet on here, it would keep this thread going for quite some time!! A bit more sophisticated than what I was expected to handle in the sixth grade.

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Mar 30, 2022 21:22:12   #
DeanS Loc: Capital City area of North Carolina
 
$30 profit. Started with $60 cash and no goat. Wound up with $90 cash and no goat.I have recalculated, dand my answer now is#0. Usoing this approach:
Start with $100-60+70-80+90=120. Started with $100, so profit is $20.

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Mar 30, 2022 21:43:47   #
bcplimpton Loc: Southern New Jersey
 
twosummers wrote:

A man buys a goat for $60.
Then he sells it for $70.
Then he buys it back for $80
And sells it again for $90

How much profit did he make?


First transaction gross -$60 net -$60
Second transaction gross +$70 net +$10
Third transaction gross -$80 net -$70
Final transaction gross +$90 net +$20

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Mar 30, 2022 22:15:02   #
StanMac Loc: Tennessee
 
I see some creative book keeping going on here . . . .

Stan

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Mar 30, 2022 22:35:08   #
Dannj
 
BebuLamar wrote:
Yes and that's why he got $20 profit. The fact that the second time he bought for more money than the first is irrellevant because it could be another item altogether and he made $10 on it.


Sorry, I don’t follow that all. I don’t see how the second transaction is irrelevant or how it can be separated. Both transactions are important. The question was: “How much profit did he make?” and the answer is $20. Work thru the math on this as if you started with $100 in cash. At the end you’ll have $20 more than when you started. If you end up with more than you started with you’ve made a profit.

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Mar 30, 2022 22:41:04   #
srt101fan
 
Wallen wrote:
Lets have a look from the other side:

Man has a goat & 20$
20$ + goat

Sells the goat for "60"
20+60=80$

Buys the goat back for "70"
80-70=10$ + goat

Sell it again for "80"
10+80=90$

Buy it again for "90"
0$ + goat

He lost 20$ on the whole transaction which was gained by the other guy.
-----------------------------------------------

Or most probably this way:

Guy has goat & sell for $60
Guy have $60

Guy wants milk so went to buy the goat back.
But 60 not enough because seller wants $70
Guy borrows 10 from bank and add to his 60 to buy goat.

Guy now have a goat and bank debt of $10
Goat is male, no milk so Guy sell it for $80

Guy have $80 but is now hungry for meat
Guy wants to buy goat but the buyer already butcher it and will only sell for $90

Guy borrows again another $10 to add to his $80 and bought a piece of goat.

So now Guy has 12lbs of goat and $20 of debt.

But is not actually true because to borrow $10 from a bank, Guy really needs to borrow $10.2
He gets the 10 and bank keeps the 0.2 as upfront interest payment.

So he really owe the bank $20.4 for the two borrows.
But he choose 12 months payment so he would actually pay the bank $40 for the compounding interest.

So in reality, in the end, Guy has a 9lbs of goat meat, 3lbs of goat bones and $40 debt.
Lets have a look from the other side: br br Man h... (show quote)


You get an "A" for creative math, Wallen!...😁

(The milk issue is a nice touch!)

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Mar 30, 2022 23:07:10   #
Dick Duffy
 
Sarco wrote:
I believe that he made $20, purchases $60 plus $80 = $14, sales $70 plus $90 = $160. Look at it another way, he made a profit of $10 out of each of the two transactions. Think of it as being two separate goats.

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Mar 31, 2022 00:57:38   #
Don's Leica Loc: Asheville, NC
 
$20

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Mar 31, 2022 08:09:22   #
Dave H2
 
$20 is the correct answer. The first transaction made $10 and was complete. The second also made $10 and was totally independent of the second one (as if the first never occurred).
D

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Mar 31, 2022 08:40:13   #
KoniOmegaflex Loc: Central KY
 
$20 is correct. It doesn't matter if the second transaction is the same goat or a different goat.

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Mar 31, 2022 10:10:45   #
Dannj
 
Dave H2 wrote:
$20 is the correct answer. The first transaction made $10 and was complete. The second also made $10 and was totally independent of the second one (as if the first never occurred).
D


But if “the first never occurred” the profit would be $10 not $20 which, as you stated, is the correct answer.

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Mar 31, 2022 10:32:47   #
DeanS Loc: Capital City area of North Carolina
 
KoniOmegaflex wrote:
$20 is correct. It doesn't matter if the second transaction is the same goat or a different goat.


Well, maybe not. Maybe someone should check with the goats>

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Mar 31, 2022 11:05:40   #
DaleBrown
 
Not true. He started with $60 debt (-$60) and a goat.
Simple math problem:
-60+70-80+90=20

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