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[ test your math skills. ]

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Old 09-21-2005, 07:55 AM   #1 of 25
PeterK
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test your math skills.


Very easy little test to do. 20 multiple choice.quiz
I got 20/20. But if I used no calculator, and had a time restriction, it probably would have been 18 or 19

Good luck!!



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Old 09-21-2005, 08:54 AM   #2 of 25
Michael Warner
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I only got 13 of 20 but I used no calculator or pencil and paper and haven't had my first cup of joe today. That's my excuse.



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Old 09-21-2005, 09:03 AM   #3 of 25
JamesED
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No calculator, but I used a 4'x4' pad of paper and a pen. 20/20, took me less than 10 mins to complete.

I'm an engineering/physics major right now. Now, asking me to take a 20 question lit. test..
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Old 09-21-2005, 09:17 AM   #4 of 25
ThomasC
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Got 20/20, but used a calculator on some. #11 took me forever to figure out, and my method of eventually getting it right was different than theirs. Here's how they got it and how I got it.

Spoiler:
The question was "What is next in this sequence? 2, 3, 8, 63..." Their answer was 3968, and you get the next number in the sequence by squaring the previous number and subtracting one. I got it by multiplying the numbers before and after it. For 2, I multiplied 1 and 3. For 3, I multiplied 2 and 4. For 8, I multiplied 7 and 9. And so on...





The man I loved - the man who vanished - he never came back at all. But maybe he's still out there, somewhere. Maybe some day, when Gotham no longer needs Batman, I'll see him again.
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Old 09-21-2005, 10:58 AM   #5 of 25
Haggai
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I haven't taken the quiz, but Thomas, your method works the same way as theirs because of something familiar from algebra:

Spoiler:
x^2 - 1 = (x+1)*(x-1)


You may have already realized that, just thought I'd point it out. Math is fun!


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Old 09-21-2005, 11:04 AM   #6 of 25
ThomasC
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Didn't realize that, but it kicked back in once I saw your explanation. Not taking math classes for four years will do that to me.

Quote:
Math is fun!
Meh. I didn't do too well in geometry (proofs ) and calculus (limits were the bane of my existence), but I was great with algebra.





The man I loved - the man who vanished - he never came back at all. But maybe he's still out there, somewhere. Maybe some day, when Gotham no longer needs Batman, I'll see him again.
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Old 09-21-2005, 12:54 PM   #7 of 25
DavidBL
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20/20, no pencil, used a calculator on 2 problems because I was lazy. One key to doing this quiz in your head is to eliminate obviously wrong answers, and often you're only left with one correct choice. For example, on the last problem,
Spoiler:
there is only one x^2 term in the whole equation. All you have to do is figure out the x^2 multiplier and look at the answers, there was only one answer with that multiplier.
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Old 09-21-2005, 02:04 PM   #8 of 25
george kaplan
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I think the point is to not use a calculator. All of the ones that look like they need a calculator don't.

These aren't the numbers, but there was one problem where you had to add two "big" numbers, let's pretend they're

1,230,486 and 5,428,238

with possible answers:

6,728,083
7,002,981
6,658,724
6,568,725

The answer is immediately obvious once you add 6+8.

There were 'tricks' like that on most problems
Spoiler:
don't remember what an isocleses triangle is? When one answer is 3 equal sides and another answer is 3 equal angles, you can eliminate both those answers immediately



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Old 09-21-2005, 05:36 PM   #9 of 25
EugeneR
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Got 19 but missed a gimme. What's the formula for calculating the third side of a triangle again? :b It's been a long time...
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Old 09-21-2005, 05:37 PM   #10 of 25
ThomasC
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Quote:
What's the formula for calculating the third side of a triangle again?
a^2 + b^2 = c^2





The man I loved - the man who vanished - he never came back at all. But maybe he's still out there, somewhere. Maybe some day, when Gotham no longer needs Batman, I'll see him again.
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