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test your math skills.


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24 replies to this topic

#1 of 25 OFFLINE   PeterK

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Posted September 21 2005 - 12:55 AM

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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#2 of 25 OFFLINE   Michael Warner

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Posted September 21 2005 - 01:54 AM

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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#3 of 25 OFFLINE   JamesED

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Posted September 21 2005 - 02:03 AM

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..

#4 of 25 OFFLINE   ThomasC

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Posted September 21 2005 - 02:17 AM

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.
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...


#5 of 25 OFFLINE   Haggai

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Posted September 21 2005 - 03:58 AM

I haven't taken the quiz, but Thomas, your method works the same way as theirs because of something familiar from algebra:

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


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

#6 of 25 OFFLINE   ThomasC

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Posted September 21 2005 - 04:04 AM

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.

Meh. I didn't do too well in geometry (proofs Posted Image) and calculus (limits were the bane of my existence), but I was great with algebra.

#7 of 25 OFFLINE   DavidBL

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Posted September 21 2005 - 05:54 AM

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,
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.


#8 of 25 OFFLINE   george kaplan

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Posted September 21 2005 - 07:04 AM

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
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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#9 of 25 OFFLINE   EugeneR

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Posted September 21 2005 - 10:36 AM

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...

#10 of 25 OFFLINE   ThomasC

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Posted September 21 2005 - 10:37 AM

a^2 + b^2 = c^2

#11 of 25 OFFLINE   DavidBL

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Posted September 21 2005 - 10:44 AM

As long as it's a right triangle, of course, otherwise it gets a bit uglier... c^2 = a^2 + b^2 - 2*a*b*cos©, where C is the angle opposite the unknown side ©. Man, I don't miss school...

#12 of 25 OFFLINE   george kaplan

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Posted September 21 2005 - 01:02 PM

Well 3,4,5 is pretty basic stuff. I didn't use a formula on that.
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#13 of 25 OFFLINE   BrianW

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Posted September 21 2005 - 03:37 PM

20 out of 20, but I used a calculator on the percentage/ratio stuff because of laziness. If you used a calculator on the negative exponent problems, however, your problem isn't laziness. You need to brush up on your exponent tricks of the trade.
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#14 of 25 OFFLINE   Tim Hoover

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Posted September 22 2005 - 01:12 AM

20/20 here as well, but I used a calculator on a couple of questions because it's early and I really didn't want to work it out by hand...
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#15 of 25 OFFLINE   Scott Merryfield

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Posted September 22 2005 - 01:33 AM

19/20 here. I was very rusty on factors -- but it's been 25 years since I've seen them, so I'm claiming senility on that one. Posted Image

#16 of 25 OFFLINE   Jason Pancake

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Posted September 22 2005 - 02:52 AM

20/20 Math is fun! The practical application of math (and computer science) is much more fun though!

#17 of 25 OFFLINE   Hunter P

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Posted September 22 2005 - 11:44 AM

20/20 with no calc. Hurray for multiple choice quizzes.Posted Image

I always contended that I could walk into any course on a college campus and get a passing grade on their multiple choice quiz regardless of my expertise in that course. In fact, that is kinda how I passed my Calc II course. I skipped half the classes (as did everyone else in the class) and slept at my desk on the other half. I don't recall ever opening the book except to pretend to be following along with the lecture even though I was really doodling. I never studied and got a B+ in the course.Posted Image Today I can barely do long division.Posted Image

So again I say, hurray for multiple choice quizzes. And for that matter hurray for grading on a curve.Posted Image
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#18 of 25 OFFLINE   JamesED

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Posted September 22 2005 - 11:57 AM

Good luck doing that for an engineering exam here. They have around 12 answer choices per question.

#19 of 25 OFFLINE   george kaplan

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Posted September 22 2005 - 11:59 AM

If your calculus class used multiple-choice tests, that's pretty sad.
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#20 of 25 ONLINE   RobertR

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Posted September 22 2005 - 12:23 PM

19/20, simply because I reversed Cathy and Brian, but the numbers were correct.




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