Friday, 5 June 2015

B Grade Maths

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


  • 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

Saturday, 20 October 2012

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.

Friday, 4 December 2009

Monday, 29 June 2009

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