103 results in Demos - search across all projects.
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A demo of the match text pattern part and its options.
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No description given
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Find a regression equation.
Now includes a graph of the regression line and another interactive graph gives users the opportunity to move the regression line around. Could be used for allowing users to experiment with what they think the line should be and see how this compares with the calculated line.
Also includes an updated SSE to see how the sum of the squares of the residuals varies with the regression line.
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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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No description given
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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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QuestionThe 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 matrix entry part and its options.
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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 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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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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Demonstration of the written number extension, which converts whole numbers to words.
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Three equilateral triangles are divided equally into 3, 4 and 5 parts respectively. Calculate the distance between two marked points.
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Taken from question 37 of the book Problem Solving in GCSE Mathematics by Daniel Griller.
Given bearings and lengths of two straight lines, work out the bearing and distance back to the starting point.
A Eukleides diagram shows the setup visually.
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No description given
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No description given
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QuestionThis question contains several mathematical expression parts which only compare part of the student's answer with the corresponding part of the expected answer, because the expression can't be evaluated as a whole.
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In this question, the correct answers can't be evaluated by substituting numbers for each of the variables.
Numbas can now infer the types of variables in the answers to mathematical expression parts, so questions like this can be marked.
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The student is asked to enter an approximation to $\sqrt{n}$, where $n$ is not a square number, to 20 decimal places.
This question is a demonstration of the high precision arithmetic in Numbas v4.
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The student is asked to give the Avogadro constant in scientific form, calculate the mass of a number of moles of carbon, in grams, and then calculate the number of molecules in that mass.
This is a demonstration of the high-precision decimal arithmetic in Numbas v4.0.
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QuestionAn interactive experiment about probability: the student must first 'design' the experiment by deciding how many times they're going to flip a coin, and define what number of heads would make them believe the coin is biased. They must then enter the results of their coin flips, calculate the percentage of heads, and finally decide if the coin is biased, using the condition they specified in the design stage. There are optional hints at each stage.
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QuestionAn example of an iterative procedure: the student must factorise a given number. At each step, they're asked if the number is factorised. If not, they must give a prime factor. If it is fully factorised, they can then work out the number of factors of the number.
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QuestionThis question demonstrates how to use explore mode to simulate a game, where each choice made by the student changes the state of the game.