## Most Popular In Algebra

Sometimes you might be asked to factorise expressions. Factorising is the opposite of multiplying out brackets - i.e. putting an expression ...

## Simultaneous Equations

These are equations you need to solve at the same time...but there's two types you could get..one of which is probably the toughest thing in...

## Inequalities

These are a bit like equations....but with one really big exception! The Symbols > Means greater than < Means less than <≥ Mean...

## Algebra In Fractions

Some questions could involve BOTH algebra and fractions. Double the fun. You Can Cancel Terms On The Top And Bottomso 2x2 y4/ xy just bec...

## Completing The Square

This is one of the trickiest things you have to do. Basically you have to express a quadratic as a squared health-canada-pharmacy.com bracke...

This solves any equation in the form ax² + bx + c = 0. It's usually given in an exam...but you should learn it and how to use it. Thi...

## Density And Speed

These two are easy to work out if you remember the triangle trick: DensityDensity is mass per unit volume. It is written, for example, li...

## Volumes

Formulas...formulas....formulas.... Volume Of A CuboidSimple! A cuboid is just a regular block. The volume is just length times height ti...

## Surface Area

If dealing with 3D shapes you might be asked to find the surface area of a shape. One way may be to look at its net. Nets A net is jus...

## Areas

Sorry! It's another page of tedious formulae. Area Of A TriangleHalf the base times the height.0.5 x h x bArea Of A ParallelogramBase tim...

## Circle Geometry

There are more rules about a circle than you would expect. Learn them all though and you'll be able to outfox the examiner. A Tangent And...

## Parallel Lines

Parallel lines are always the same distance apart ("equidistant") and will never meet. Examiners love to throw in a question or two about th...

## Basic Probability

All Probabilities Are Between 0 And 1 A probability of 1 means something is certain to happen A probability of 0 means something d...

## Scatter Graphs

Scatter graphs tell you how closely two things are related....which is called "correlation".If you can draw a line of best fit on your graph...

## Histograms and Frequency Density

Histograms are like bar charts but the bars can have different widths...and the area of the bar shows the frequency...sounds confusing right...

## Cumulative Frequency

Cumulative frequency means you just keep a running total as you go along. Example: The table below shows the lengths of 32 bananas. Draw a c...

## Sampling And Bias

Representative Sample DataThe total group you want to find out about is called the population...but you might not to be able to get data for...

## Mean, Median, Mode and Range

Mode = The Most CommonThis is easy to find in tallied data and is not distorted by extreme values. However sometimes it doesn't exist or the...

## Most Popular In Graphs

The gradient just measures how steep the graph is. The bigger the gradient, the steeper it is.You should learn the following formula:So let'...

## Parallel And Perpendicular Lines

Parallel LinesThese are just lines that have the same gradient. Above you will see the lines for y = 1.5x +1 and y = 1.5x - 0.5.It doesn...

Quadratic graphs sound hard...but they're not really! They are simply just graphs in this format: y = x2 + anything To plot a quadrat...

## Other Types Of Graph

There are some other types of graph that you should be familiar with: Quadratic Graphs and Quadratic Equations You may be asked to use...

## Transforming Graphs

BEWARE! THIS IS HARD!! NOTE: f(x) just means an equation like y = something x. It's not something to be scared by!There are a few ways yo...

## Straight Line Graphs

A straight line graph can contain: an x term a y term a number So if you only see these terms in an equation, you know you ar...

## Decimal Places And Significant Figures

Decimal places and their trickier cousins significant figures both tell you the how accurately a number should be written. We don't always n...

## Types Of Number

In some of the wordier questions examiners might throw in a few terms like "integer" or "irrational number", so make sure you know what thes...

## Ratios

Ratios look like this.......and there's a few things you might be asked to do with them. Simplify A Ratio E.g. Reduce 7.2 : 6 to its s...

## Simple and Compound Growth/Decay

Simple growth is well....simple. It basically means a percentage of the original amount is added on at certain intervals.So if £100 gains 10...

## Percentages

There's a few things you might be asked to do with percentages.... Find X% of YJust turn the percentage into a decimal then multiply.So 3...

## Vectors

A vector quantity has both size and direction.There's a few way vectors are written. For example if a vector goes 3 units right and 4 units ...

## 3D Trigonometry

Trig can look really scary in 3D....but if you keep calm and simplify it by drawing it as 2D shapes you'll be rewarded with an A*. Exampl...

## Pythagoras’ Theorem

This only works for right angled triangles!Examiners love to give you "distance between two points" questions that involve this theorem. ...

## Sin, Cos, Tan

There's three different sides to a triangle: The hypotenuse is the longest side The opposite is the side opposite to the angle being u...

## The Sine and Cosine Rules

SOH CAH TOA applies to right angled triangles....but when you have other triangles the sine and cosine rules come into play. In the followin...

## 3D Pythagoras

With 3D shapes sometimes you need to use Pythagoras more than once to find a particular length.CuboidsThere's a formula in cuboids for findi...