The Highest Common Factor and Lowest Common Multiple of two numbers is found through prime factorisation.

### Sequences – Linear and Quadratic

How to form and solve the nᵗʰ terms of linear and quadratic sequences.

### Linear Equations

Linear equations are equations that, when plotted on a line graph, produce a straight line.

### Formulating and Evaluating Expressions

Algebraic expressions are collections of numbers, letters and symbols. They are evaluated by replacing their variables with numerical values and turning them into equations.

### Rounding, S.F and Estimation

Normal rounding is quite simple, significant figures is a more advanced form. Estimation is using both methods to produce a rough answer to a problem.

### Circle Circumference & Area and Prism Volume & Surface Areas

Look at the bloody title.

### Averages

There are three types - mean, mode and median. Also sort of range...