This video is all about how to change the subject of a formula, and is aimed at around grade 5 GCSE maths. Make h the subject of the formula M = √((2h + 1)/3) These types of questions appear in all the main examination boards, including Edexcel, AQA and OCR. They are popular and, once you have the basic principles, fairly similar. Please do stop the video, try the … [Read more...]

  This video is all about changing the subject of a formula, and is aimed at around grade 6 GCSE maths. The difficulty with this type of question is the requirement to factorise: Make y the subject of the formula 3(y + 2) = a(5 - 2y) These types of questions appear in all the main examination boards, including Edexcel, AQA and OCR. They are popular and, once … [Read more...]

 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...]

This video is all about how to calculate ratio in 'more than' questions and is aimed at around grade 4 GCSE maths. These are a little more challenging, and involve the ‘more than’ type of questions. Here's three different questions for you to try: Arni, Bethany and Carrie save some money in the ratio 3:4:9. Carrie saved £150 more than Bethany. Show that Arni saved £90. … [Read more...]