General GCSE
Target Grade B

Find the HCF and LCM of two or more numbers

 *Prime Factors 2 - HCF
 *Prime Factors 3 - LCM
 Prime factors, HCF, LCM

Rounding to significant figures

Convert between recurring decimals and fractions

 Converting recurring decimals to fractions
 Converting recurring decimals to fractions calculator

Standard index form

 Standard Index Form

Percentage multipliers, 'reverse' and multiple percentages, compound interest

 *Percentage multipliers
 Percentage multipliers

Solve harder linear equations

 Harder Linear Equations

Expand two brackets and simplify

Solve quadratic equations by factorising

 Factorising quadratics

Rearrange formulae with brackets, fractions and roots

Solve linear inequalities

 Solving inequalities

Sets of Inequalities - Regions of Graphs

 *Inequalities - Regions of Graphs
 Inequalities - regions of graphs

Simultaneous equations

 Simultaneous equations solved algebraically - applet
 *Simultaneous equations 1
 *Simultaneous equations 1a
 *Simultaneous equations 2
 Simultaneous equations solved graphically - applet

Angles in circles

 *Circles and isosceles triangles  
 Cyclic quadrilaterals  
 *Angle in a semicircle...  
 *The angle at the centre ...
 Angles in the same segment...  

Properties of tangents and chords of circles

 *2 theorems about tangents and circles
 *The alternate segment theorem

Dimensions and formulae

 Dimensions and formulae

Similar triangles

 *Similar triangles 1

Pythagoras - distance between coordinates

Trigonometry in right-angled triangles

 Simple trigonometry applet

Time series and moving averages

 Moving averages

Cumulative frequency diagrams

 Cumulative frequency diagrams 1
 Cumulative frequency applet

Estimating median and interquartile range

 Median and quartiles

Boxplots

 Boxplots

 Boxplots

Probability - tree diagrams

 *Tree diagrams 1
 Tree diagrams 1