648 results authored by Christian Lawson-Perfect - search across all users.
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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 x2+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.
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The matrix entry part in this question marks any symmetric matrix as correct, using a custom marking algorithm. A matrix is symmetric if it is equal to its transpose.
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Demonstration of the written number extension, which converts whole numbers to words.
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Calculate the concentration of a dilute acid given the amount and concentration of dilute alkali to neutralise it. Cribbed from this Bitesize problem.
There are steps to break down the calculation, and the student must give units at each step.
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Use the testing tab in the variables section to make sure the generated variables satisfy a condition
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This question loads an extension which contains a dataset in JSON format. The data is made available as a JME variable called 'animal_data'.
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A quick implementation of certainty-based marking: the student's score depends on how they rated their certainty in their answer before submission.
Because Numbas doesn't allow negative marking at the moment, scores are shifted upwards, so a high certainty incorrect answer scores 0, and a high certainty correct answer scores full credit.
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Choose from one of several pre-defined scenarios, and set variables to the corresponding values.
This question has three variables:
city,population, andpercent_like_chocolate. These differ for each city. -
A collection of questions to show off at a workshop for the North East and Yorkshire sigma hub, June 2016.
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Some questions to show off features of Numbas, linked from the Numbas homepage.
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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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A collection of questions to show off at a workshop for Newcastle's LTDS, June 2016.
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Some questions which demonstrate the adaptive marking feature.
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A couple of questions demonstrating the use of the Eukleides extension to create geometrical drawings.
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Some questions to show off features of Numbas, linked from the Numbas homepage.
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Some questions demonstrating new features in Numbas v4.0: pattern-matching, inference of variable types in mathematical expression parts, and marking equations.
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This 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 √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.
