CONSTRATINTS
Basic Questions
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Multiple Choice
1/1 point (graded)
This a multiple-choice problem. You will choose just one response, receiving credit for
the right answer.
Select a vowel from the list below.
A correct
B
C
D
E
Submit
Some problems have options such as save, reset, hints, or show answer. These options follow
the Submit button.
Hint Show Answer
Dropdown
1/1 point (graded)
This is a dropdown problem. It's basically identical to a multiple-choice problem, it just
displays things in a different way. Dropdown problems only ever have one correct
answer.
Which of these numbers is a prime number?
17
correct
Submit
Some problems have options such as save, reset, hints, or show answer. These options follow
the Submit button.
Hint Show Answer
Checkboxes
1/1 point (graded)
This a checkbox problem, also known as a "check all that apply" problem. You will
choose ALL of the correct responses, receiving full credit only if you select all of them
and none of the incorrect answers.
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,This problem also allows for partial credit! It uses a scheme called "Every Decision
Counts," which is the standard scheme in this course. Each choice is worth an equal
amount of the total credit (20% in this case). Try answering the question different ways
to see how partial credit works!
Which of the following are vowels? Select all that apply.
A
B
C
D
E
Complex Questions
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Numerical Input
1/1 point (graded)
Some problems require a numerical input. Your answer will be marked correct if it is
within a certain range of the right answer (usually about 5%, though it varies from
problem to problem).
If you need a calculator, you can find an icon in the bottom right-hand corner of your
window that will show one for you. Click the (i) button to learn how to use it. You can
also find many good calculators online, from Google's push-button calculator to Wolfram
Alpha.
Enter the approximate value of the mathematical constant π (pi):
3.14
correct
3.14
Submit
Some problems have options such as save, reset, hints, or show answer. These options follow
the Submit button.
Show Answer
Exponential Input
1/1 point (graded)
Very large or very small numbers are best input with exponential notation. For instance,
the number 8,000,000 (eight million) is equal to 8×106. In this course, you can enter
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,that as either 8 * 10 ^ 6 or as 8e6 in these problems. Try out exponential notation in the
question below.
One gigajoule is equal to 947817 British thermal units. Enter this number below in
exponential notation. The tolerance on this question is 5%.
9.47e5
BTU correct
9.47×105
Submit
Some problems have options such as save, reset, hints, or show answer. These options follow
the Submit button.
Show Answer
Formatting Numbers
While there is a 5% tolerance for most of the problems in this course, you must also be
sure to enter your numbers in the right format. If you type "9.48e5" in the answer box
above, the computer knows how to interpret that. Similarly, it knows how to interpret
"9.48*10^5" or"9.48 * 10 ^ 5" (with spaces).
What it doesn't know how to do is handle "9.48 x 10 ^ 5" with an "x" instead of a star.
That little change throws things off. You need to use exactlythe right formatting.
This is one of the most common errors made by people who are new to edX. If you are
working on a numerical problem, you should double-check your formatting before
entering each answer.
Also - did you look at the answer to the last problem? It contains extra information about
partial credit in numerical problems! Go take a look if you didn't see it before.
Matching
1.0/1 point (graded)
This is a matching exercise. Drag the elements on the left into the ones on the right to
create a match. Click on the [-] to remove the match. You can match items with more
than one other item, but you should choose the best match if you can. Click on the
individual items for a better view if you need it.
This problem type gives partial credit! Each correct assignment is worth one point; each
error takes a point away. Play around with different matches to see how it works.
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, Syllabus Quiz, Part 1
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Now that you know how to answer edX questions, it's time for your first quiz. Below are
some quick questions to make sure you understood the most important highlights from
our syllabus. This should be very easy - all of the information can be found on
the Syllabus, the Schedule page, and in the introductory videos in this section.
A syllabus quiz might seem a little silly, but reading the syllabus carefully will improve
your course experience. Also, our course staff often spend a substantial amount of time
answering questions where the answer is in the syllabus. We're always happy to help,
but hopefully this quiz will help you know the most important information before starting
the course.
Unlike the practice problems, this quiz is graded, so do your best! This quiz appears
as Work01 on your Progress page.
Annotate
Collaboration
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