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 Post subject: A new world record!Posted: Sun, 19 Jun 2011 00:02:20 UTC
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Joined: Mon, 19 May 2003 19:55:19 UTC
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Location: Lexington, MA
Hello, everyone!

This problem appeared at another site, followed by my response.

Brace yourself . . . This is painful!

Quote:

. . . . Wow!

I really stretched my imagination
. . . and still couldn't believe what I saw.

First of all, those square roots are probably cube roots: .

. . ?

. . ?

. . ?

?

. . ?

. . ?

. . ?

?

?

??

This should be in the Guinness Book
. . for "The Most Errors in One Solution".

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

And did you see what he did with the second problem?

Quote:

Did he really do this?

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 Post subject: Posted: Sun, 19 Jun 2011 17:31:02 UTC
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Joined: Sun, 24 Jul 2005 20:12:39 UTC
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Location: Ottawa Ontario
Soroban, are you his teacher ?

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 Post subject: Re: A new world record!Posted: Sun, 19 Jun 2011 17:36:18 UTC
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Joined: Mon, 29 Dec 2008 17:49:32 UTC
Posts: 6007
Location: 127.0.0.1, ::1 (avatar courtesy of UDN)
Without the URL I could only guess. I'm not sure about all those mistakes you (Soroban) are imagining... did (s)he simplified correctly instead of going through two wrong steps ?

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 Post subject: Posted: Sun, 19 Jun 2011 18:01:13 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12098
Location: Austin, TX
Denis wrote:
Soroban, are you his teacher ?

I believe Soroban is retired.

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 Post subject: Posted: Sun, 19 Jun 2011 20:31:43 UTC
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 Post subject: Re: A new world record!Posted: Mon, 20 Jun 2011 00:35:09 UTC
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Joined: Wed, 1 Oct 2003 04:45:43 UTC
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outermeasure wrote:
I'm not sure about all those mistakes you (Soroban) are imagining... did (s)he simplified correctly instead of going through two wrong steps ?

Given that it was originally a square root and not a cube root, it's the student who's full of crap.

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 Post subject: Posted: Mon, 20 Jun 2011 01:47:01 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
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Denis wrote:

*needs a sarcasm meter*

Though I do think bad teacher bad student, but perhaps not the other way around (necessarily).

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 Post subject: Posted: Mon, 20 Jun 2011 02:05:27 UTC

Joined: Sat, 26 Apr 2003 22:14:40 UTC
Posts: 2063
Location: El Paso TX (USA)
Denis wrote:

*needs a sarcasm meter*

Though I do think bad teacher bad student, but perhaps not the other way around (necessarily).

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 Post subject: Posted: Mon, 20 Jun 2011 06:59:59 UTC
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Location: Austin, TX
helmut wrote:
Denis wrote:

*needs a sarcasm meter*

Though I do think bad teacher bad student, but perhaps not the other way around (necessarily).

That's what I said all right. . .

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 Post subject: Posted: Mon, 20 Jun 2011 07:16:02 UTC
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Joined: Mon, 23 Feb 2009 23:20:33 UTC
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That's what I said all right. . .

Actually what you said was "unparseable or potentially dangerous" ... presumably some sort of Lovecraftian oath put down in mathematical notation, and suppressed automatically by the server for the sake of readers' safety.

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 Post subject: Posted: Mon, 20 Jun 2011 07:31:12 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
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aswoods wrote:
That's what I said all right. . .

Actually what you said was "unparseable or potentially dangerous" ... presumably some sort of Lovecraftian oath put down in mathematical notation, and suppressed automatically by the server for the sake of readers' safety.

Well so I did. Thanks helmut! And you as well aswoods.

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 Post subject: Re: A new world record!Posted: Mon, 20 Jun 2011 07:37:46 UTC
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Matt wrote:
outermeasure wrote:
I'm not sure about all those mistakes you (Soroban) are imagining... did (s)he simplified correctly instead of going through two wrong steps ?

Given that it was originally a square root and not a cube root, it's the student who's full of crap.

Sure, but the goal here is to find the minimum number of mistakes committed to get that "answer" (otherwise you can go on adding mistakes to make number of mistakes (or the density) committed arbitrarily high, even in the case when he/she/it did everything correctly).

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 Post subject: Re: A new world record!Posted: Mon, 20 Jun 2011 17:20:19 UTC
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Joined: Mon, 19 May 2003 19:55:19 UTC
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Location: Lexington, MA
Hello, outermeasure!

Quote:
Without the URL I could only guess.
I'm not sure about all those mistakes you (Soroban) are imagining...
Did (s)he simplify correctly
. . instead of going through two wrong steps ?

Good point . . .

I too thought he/she got one step correct.

. (the rule seems to be "subtract indices")

. .

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 Post subject: Re: A new world record!Posted: Mon, 20 Jun 2011 17:24:12 UTC
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Joined: Mon, 29 Dec 2008 17:49:32 UTC
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Soroban wrote:
Hello, outermeasure![/size]

Quote:
Without the URL I could only guess.
I'm not sure about all those mistakes you (Soroban) are imagining...
Did (s)he simplify correctly
. . instead of going through two wrong steps ?

Good point . . .

I too thought he/she got one step correct.

. (the rule seems to be "subtract indices")

. .

No, the rule could have been: "n-th root of x^n is x, otherwise subtract indices".

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 Post subject: I wish I got \$100 for every mistake I've found in math booksPosted: Tue, 21 Jun 2011 23:29:14 UTC
 S.O.S. Oldtimer

Joined: Sat, 31 Oct 2009 20:14:21 UTC
Posts: 158
I could make a living at it.

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