Solving quadratic equations using a formula,

Solve a system of three simultaneous linear equations

Multiplication of $2 \times 2$ matrices.

Cramers Rule applied to 3 simultaneous equations

Solving for a geometric series

Find the nth term of a Geometric progression

Find the sum of the first n terms of an arithmetic progression

Find the nth term of an Arithmetic progression

Given some random finite subsets of the natural numbers, perform set operations $\cap,\;\cup$ and complement.

Given some random finite subsets of the natural numbers, perform set operations $\cap,\;\cup$ and complement.

Given some random finite subsets of the natural numbers, perform set operations $\cap,\;\cup$ and complement.

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Cramers Rule applied to 3 simultaneous equations

Solve a logarithmic equation

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

Cancelling to reduce a fraction to its lowest terms.

This is a set of questions designed to help you practice adding, subtracting, multiplying and dividing fractions.

All of these can be done without a calculator.

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Questions testing understanding of the precedence of operators using BIDMAS, applied to integers. These questions only test DMAS. That is, only Division/Multiplcation and Addition/Subtraction.

determine the least residue mod n of a given number.

Round random numbers to the closest whole number, 1 to 3 decimals places. Also rounding that could show common misunderstandings.

Useful for a review of the base 10 number system before introducing different bases and also just ensuring students understand how the base 10 system works.

A sneak peek at a really clever integration of GeoGebra with Numbas.

6 questions which introduce the user to the Numbas system.

This activity has a variety of percentage questions all designed to be done without a calculator.

Q1 is useful for MfB

Q2 is useful for MfB - wording to look at?

Q3 I don't understand this Q, should be removed or re-worded

Q4 good questions but too many, make them more business like

An example of using the GeoGebra extension to ask the student to create a geometric construction, with marking and steps.

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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.

Statements about the different kinds of averages where you have to select "always", "sometimes", or "never".