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Given the number of international students enrolled on a course of $n$ students, calculate the percentage of 'home' students.

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This question tests the students ability to factorise simple quadratic equations (where the coefficient of the x^2 term is 1) and use the factorised equation to solve the equation when it is equal to 0.

Pulley supported by a cable, so the tension in the rope is constant.    Advice is a youtube video showing how to solve the problem.

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Cofactors Determinant and inverse of a 3x3 matrix.

Exercises on calculating the determinant of 2x2 and 3x3 matrices.

Exercises on calculating the determinant of 3x3 matrices.

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

This question tests learner's knowledge of the inverse matrix method for a 3x3 matrix.

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

Multiplication of two matrices.

This question tests if a students understands when matrices are conformable

This question tests understanding of subscript notation for matrices

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Details on inputting numbers into Numbas. (German translation)

Dealing with functions in Numbas. (Translation to German.)

Inputting ratios of algebraic expressions. (Translation to German)