This video is all about how to solve quadratic inequalities and is aimed at around grade 7+ GCSE Maths. Work out the integer values that satisfy 1) 2x² - 10x + 10 < 0 2) x² - 7x + 11 < 0 How to solve quadratic inequalities questions appear in all the main examination boards, including Edexcel, AQA and OCR. They are popular and, once you have the basic … [Read more...]

 This video is about how to solve difficult simultaneous equations, and is around grade 7+  .... these questions can be quite challenging. Solve 3y = 5 - 2x y² = xy +5   Top Tips! This type of question is usually solved by substitution - making everything 'x' or 'y' Once you've got an equation it'll need solving Sometimes it involves using … [Read more...]

  In this post we're looking at a venn diagram. These types of questions tend to be fairly straightforward ... or much more difficult ... and, unfortunately, there isn't anything in the middle ground. I must admit it took me a little while to understand these, and it's only by constantly reading that I was able to work through the questions. Download the worksheet … [Read more...]

This post is a little different than the recent Edexcel or AQA GCSE exam papers, and it’s a more in keeping with the whole idea of 3minutemaths.co.uk. GCSE Maths Completing the Square is one of those topics that can be learned in 3 minutes  :-) but then requires a little more practice. So, here’s a number of videos to help you work through the types of problems that you’ll … [Read more...]

Recurring decimals to fractions questions seem to appear fairly frequently on GCSE papers - especially non calculator, if there is some degree of cancelling down required. You need to be able to follow the same sort of method each time, but be prepared for occasional arithmetic. The whole idea is to create a way of subtracting two values of 'n' in order to get rid of the … [Read more...]