English sentences which are propositions are given and for each the appropriate proposition  involving quantifiers is to be chosen. 

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Inverse and division of complex numbers.  Four parts.

Example of an explore mode question. Student is given a 3x3 matrix and is asked to find the characteristic polynomial and eigenvalues, and then eigenvectors for each eigenvalue. The part asking for eigenvectors can be repeated as often as the student wants, to be used for different eigenvalues.

Assessed: calculating characteristic polynomial and eigenvectors.

Feature: any correct eigenvalue will be recognised by the marking algorithm, even multiples of the obvious one(s) (which can be read off from the reduced row echelon form)

Randomisation: Not randomised, just using particular matrices. I am still working on how to randomise this for 3x3; a randomised 2x2 version exists. I have several different versions for 3x3 (not all published yet), so I could make a random choice between these in a test.

The implementation uses linear algebra functions such as "find reduced echelon form" or "find kernel of a reduced echelon form", from the extension "linalg2".

Differentiate $f(x) = (a x + b)/ \sqrt{c x + d}$ and find $g(x)$ such that $ f^{\prime}(x) = g(x)/ (2(c x + d)^{3/2})$.

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Basic descriptive statistics - measures of centre and spread, from a list of data and frequency tables.

Differential equations.

rebelmaths

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First- and second order recurrence equations, homogenous and nonhomogenous

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No time limit - unlimited regeneration of questions allowed from these groups:

• Notation and Algebra
• Calculus - Differentiation
• Calculus - Integration
• Trigonometry and Matrices

Putting a pair of linear equations into matrix notation and then solving by finding the inverse of the coefficient matrix. 

Addition and subtraction of matrices; multiplication by scalar.

Simple trig equations with radians

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Algebra Test 1

This question demonstrates a few ways of interacting with a Venn diagram drawn using JSXGraph.

Two questions testing the application of the Cosine Rule when given two sides and an angle. In these questions, the triangle is always acute and both of the given side lengths are adjacent to the given angle.

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Music Quiz

Find the forces in the members of a truss using the method of joints.

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Compute the experimental probability of a particular score on a die given a sample of throws, and compare it with the theoretical probability.

The last part asks what you expect to happen to the experimental probability as the sample size increases.