318 results authored by Christian Lawson-Perfect - search across all users.

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  • Mark equations

    by Picture of Christian Lawson-Perfect Christian Lawson-Perfect and 2 others

    All the answers in this question are equations. In order to mark each equation, Numbas needs to pick some values that satisfy the equation and some that don't, and check that the student's answer agrees with the expected answer.

    Any equation with the same solution set as the expected answer will be marked correct.

    Question Ready to use

    CC BY Published

    Last modified 16/08/2019 12:31

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  • Ask for significand and exponent of a number in scientific notation separately

    by Picture of Christian Lawson-Perfect Christian Lawson-Perfect and 1 other

    This question shows how to ask for a number in scientific notation, by asking for the significand and exponent separately and using a custom marking algorithm in the gap-fill part to put the two pieces together.

    Answers not in standard form, i.e. with a significand not in $[1,10)$, are accepted but given partial marks.

    Question Draft

    CC BY Published

    Last modified 13/08/2019 20:21

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  • Complete the square and find solutions

    by Picture of Christian Lawson-Perfect Christian Lawson-Perfect and 1 other

    Solve a quadratic equation by completing the square. The roots are not pretty!

    Question Ready to use

    CC BY Published

    Last modified 13/08/2019 16:36

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  • Only mark a gap depending on the answer to a previous gap.

    by Picture of Christian Lawson-Perfect Christian Lawson-Perfect and 1 other

    Student is asked whether a quadratic equation can be factorised. If they say "yes", they're asked to give the factorisation.

    Question Should not be used

    CC BY Published

    Last modified 13/08/2019 11:54

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  • Pattern matching - factorise an equation

    by Picture of Christian Lawson-Perfect Christian Lawson-Perfect and 1 other

    The student is asked to factorise a quadratic $x^2 + ax + b$. A custom marking script uses pattern matching to ensure that the student's answer is of the form $(x+a)(x+b)$, $(x+a)^2$, or $x(x+a)$.

    To find the script, look in the Scripts tab of part a.

    Question Ready to use

    CC BY Published

    Last modified 13/08/2019 11:53

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  • Custom marking - answer is a set

    by Picture of Christian Lawson-Perfect Christian Lawson-Perfect and 1 other

    No description given

    Question Ready to use

    CC BY Published

    Last modified 23/07/2019 14:21

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  • Use student input in a JSXGraph diagram

    by Picture of Christian Lawson-Perfect Christian Lawson-Perfect and 1 other

    There are copious comments in the definition of the function eqnline about the voodoo needed to have a JSXGraph diagram interact with the input box for a part.

    Question Has some problems

    CC BY Published

    Last modified 23/07/2019 14:12

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  • Question Ready to use

    CC BY Published

    Last modified 16/07/2019 15:20

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  • Displaying surd fractions

    Shows how to use the sqrtSquare simplification rule to display a randomly-chosen fraction involving surds on either the top or bottom.

    Question Draft

    No licence specified Published

    Last modified 26/06/2019 11:04

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  • Arbitrary constant of integration

    The student must perform an indefinite integration, and include a constant of integration.

    A custom marking algorithm identifies the name of the student's constant of integration, and replaces it with 'c' before comparing with the expected answer.

    If the student enters something like '2c' instead of 'c', it'll be marked wrong, which is an error in the marking.

    Question Draft

    CC BY Published

    Last modified 17/06/2019 14:03

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