B Grade Maths

These are the topics that need to be covered and understood for B grade in GCSE Maths:

Number

• Standard form
• Percentage increase/ decrease
• Compound interest/ depreciation
• Reverse percentage and here
• Four rules of fractions

Algebra

• Quadratics
• Factorising
• Difference of two squares
• Simultaneous equations
• y = mx + c
• Regions
• Graphs of cubic and reciprocals
• Recognise the shapes of functions

Shape and space

• Trigonometry
• Bearings by trigonometry
• Similar shapes
• Circle theorems

Handling data

• Cumulative frequency
• Boxplots
• Tree diagrams

Quadratics and simultaneous equations

Quadratics and Simultaneous Questions by Steve Bishop

Reverse percentages

Standard form

Please note the tutor in the second YouTube speaks of 'moving the decimal point'; the decimal point doesn't really move, but it is the same as if it did move.

Box plots

Handling Data boxplots

View more presentations from Steve Bishop.

Reverse percentages

An example:
Try to do the question first:

In a sale, normal prices are reduced by 12%
The sale price of a a computer is £726.
Work out the normal price of the computer

Another worked example

A hat costs £99.60 after a 17% priced reduction.
How much was it before the reduction?

Percentage increase/decrease