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
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...
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.
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
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.
20/20 with no calc. Hurray for multiple choice quizzes.
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. Today I can barely do long division.
So again I say, hurray for multiple choice quizzes. And for that matter hurray for grading on a curve.