643 results authored by Christian Lawson-Perfect - search across all users.
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Widget Sales
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This question demonstrates how to use the "Download a text file" extension to create a link to download a file containing text created from question variables.
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This question shows how to load a GeoGebra applet from geogebra.org.
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This question applies a rewriting rule to the student's answer and correct answer, to interpret chained inequalities $a<b<c$ and $a>b>c$ as $(a<b) \wedge (b<c)$ and $(a>b) \wedge (b>c)$ respectively.
This is a work-around until the parser interprets chained relations this way automatically.
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This question is the one described in method 1 of the example "Apply a standard integral" in the Numbas documentation.
The student is shown a randomly chosen function to integrate. The function is one of $e^{kx}$, $x^k$, $\cos(kx)$, $\sin(kx)$, with $k$ a randomly chosen integer.
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Customised for the Numbas demo exam
Factorise $x^2+cx+d$ into 2 distinct linear factors and then find $\displaystyle \int \frac{ax+b}{x^2+cx+d}\;dx,\;a \neq 0$ using partial fractions or otherwise.
Video in Show steps.
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Demonstration of adaptive marking: the student must first add up the number of apples to buy, then work out how much that would cost. Adaptive marking carries an incorrect number of apples into the cost calculation.
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The student is asked to add two four-digit numbers. Alternative answers are set up with progressively expanding ranges of accepted values, so the student gets more marks for getting closer to the true answer.
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Given the gradient of a slope and the coefficient of friction for a mass resting on it, use the equations of motion to calculate how it moves.
Includes a GeoGebra rendering of the model.
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An example of using the GeoGebra extension to ask the student to create a geometric construction, with marking and steps.
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A demo of the choose one from a list part and its options.
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A demo of some custom part types.
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This question shows how to load a GeoGebra applet in JavaScript, avoiding the JME functions. This allows you to do some more complicated manipulation of the worksheet than simply redefining objects.
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This demonstrates how to construct a JSXGraph diagram in JME code.
The construction shows a triangle and its orthocentre, circumcentre and centroid. They are always collinear. You can move the vertices of the triangle.
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A few questions which use the GeoGebra extension.
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This question shows how to use the GeoGebra extension to start with a blank worksheet, and add objects to it.
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This question demonstrates how to link a GeoGebra object to the answer to a part.
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This question demonstrates how to display a GeoGebra worksheet loaded from a file attached to the question.
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An example to help debug a problem with GeoGebra.
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Given a parcel's width, height and length, calculate its volume and surface area. Additionally, classify its size based on a formula inspired by a real delivery company (as mad as it sounds!).
The student must give units with each measurement.
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Work out \(k\) when \( y = kx^2\).
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Finding areas under graphs using definite integration.
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This is an old demo. For a demonstration of Numbas's current features, please see the newest demo exam.
A few questions which show off various features of Numbas.
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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.
