kitchen table math, the sequel: Barry

Wednesday, February 4, 2009

Barry



Factoring Worksheet
100%
(4 out of 4 Questions Correct)
Fun quizzes, surveys & blog quizzes by Quibblo


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6 comments:

Anonymous said...

Here's a link to another one:

http://www.bhs87.org/math/mathprac.htm

February 4, 2009 at 6:23 AM
Barry Garelick said...

Hey,folks, when I took the exam and filled out the form, I thought they'd post it on the comments in the Washington Post, rather than a screaming headline on KTM. Well, OK, I have to admit, I am rather proud of my factoring prowess. I was going to do a doctorate in factoring, but couldn't find any advisors. Maybe this notice will help.

February 4, 2009 at 6:38 AM
SteveH said...

I love factoring.

I clicked through and took the test. I even clicked on the option that challenged me to take a Mind Quiz and beat the high score of 97%. While I was answering the 10 questions, I wondered where the 97% came from. Then, when I wanted to find the result, they asked for my cell number. Right. When I "x'ed" out, I got a pop-up "Crush Alert" telling me to find out who it was. after a series of pop-ups, I finally returned to KTM. I escaped.

I have definitely developed some 21st century skills.

February 4, 2009 at 7:31 AM
Anonymous said...

Quibblo is a good name for it, because I have several quibbles with question 4:

1. Is it a typo that they have both X (uppercase) and x (lowercase) in the same expression? If not, then none of the answers is correct.

2. The expression reads:
4x^3 + 4X^2 - X - 1
I'll assume x=X because otherwise none of the choices is correct. The "correct" answer that they accept is:
(4X^2 - 1)(X + 1)
However, (4X^2 - 1) can be factored into (2X - 1)(2X + 1), so the real correct answer, which has been chosen by more people than either of the other two answers, is:
(2X - 1)(2X + 1)(X + 1)

I've run through this three times and can't find where I've gone "wrong". Is it me, or is it the quiz?

February 4, 2009 at 8:25 AM
Barry Garelick said...

It appears to be the quiz. Darn; there goes my perfect score.

February 4, 2009 at 9:47 AM
Niels Henrik Abel said...

I was flabbergasted to see that I had a score of 75% on the quiz, until I saw that other took issue with Q4. Apparently the quiz makers didn't follow their own directions, as they do specify "factor completely."

Dumb quiz.

There, now I feel better :)

February 4, 2009 at 12:25 PM

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