Here’s a few videos on how to draw box plots, sometimes called box and whisker diagrams. They are fairly popular on GCSE mathematics although occasionally you'll be asked to compare them with cumulative frequency diagrams. Both CF and box plots give the same time of information - median, upper / lower quartiles and range.  questions where Top Tips! ● Box plots are just … [Read more...]

Cumulative frequency diagrams are quite popular on GCSE mathematics papers. They can be fairly straightforward, although it'll be useful to also practice box plots. The information is fairly similar ... you can find the median, quartiles and ranges in both, with a typical question comparing information from both sources. Q4 on these past paper questions might be useful to … [Read more...]

Here's a few videos on how to work with a probability tree diagram that I hope might be useful. They've always been fairly popular on GCSE mathematics and generally fall into 2 types of questions: 'with' and 'without' replacement. The 'with' tend to be entirely unrelated events, such as badminton and tennis games. The 'without' are usually sweets or marbles taken out of … [Read more...]

Compound interest using a formula questions are fairly popular on GCSE mathematics papers, usually around question 10, in the middle of the paper.  They are classified as 'functional maths,' meaning that you might use this type of calculation in real life. Even if you can't get a 4% compound interest rate :-) This particular question is around GCSE grade 4 - 5 (B in old … [Read more...]