Two sample t-test to see if there is a difference between scores on questions between two groups when the questions are asked in a different order.

Shows how to use the "random person" extension to pick random names using the built-in French data set.

Shows how to use the "random person" extension to pick random names for people in your questions.

The student is asked to write a matrix with a certain property, or tick a box labelled "this is impossible" if it can't be done.

A custom marking algorithm on the gap-fill part first checks if the student ticked the box. If they did, their answer is marked correct if it really is impossible. If they didn't tick it, their matrix is checked against the required property.

One question on determining whether statements are propositions.

Four questions about truth tables for various logical expressions.

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Straightforward solving linear equations question.

Adapted from 'Simultaneous equations by elimination 1 with parts' by Joshua Boddy.

Shows how to define variables to stop degenerate examples.

Solve a system of linear equations using Gaussian elimination.

Students will solve for x using algebraic maipulation.

Solving a system of three linear equations in 3 unknowns using Gauss Elimination in 4 stages. Solutions are all integral.

Multiplication of $2 \times 2$ matrices.

Adding and subtracting two 3x3 matrices.

Addition, subtraction and multiplication of 2 x 2 matrices and multiplication by a scalar.

(Last three parts of original question removed.)

Quiz to assess matrix addition, subtraction, multiplication and multiplication by scalar, determinants and inverses, solving a system of simultaneous equations.

Find the determinant and inverse of three $2 \times 2$ invertible matrices.

Elementary Exercises in multiplying matrices. 

Add three vectors by determining their scalar components and summing them.

Linear combinations of $2 \times 2$ matrices. Three examples.

Find the determinant and inverse of three $2 \times 2$ invertible matrices.

Multiplication of $2 \times 2$ matrices.

aij  notation and definition of the order of a matrix.

Matrix addition, multiplication. Finding inverse. Determinants. Systems of equations.

rebelmaths

Linear combinations of $2$ dimensional vectors. 

Linear combinations of $2 \times 2$ matrices. Three examples.

Demonstrates how to create variables containing LaTeX commands, and how to use them in the question text.

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This is a quiz on truth tables.

Determine if an argument is valid or not.