These videos deal with density mass volume problems, and are aimed at around grade 5 GCSE maths. You'll need to apply the formula: density = mass/ volume with most of the questions and, as before, please do stop the video, try the questions, and compare your solution. 1. The diagram shows a solid cuboid made of wood. The wood has a density of 0.56 grams per cm … [Read more...]

Reverse percentage are very popular GCSE maths problems, aimed at around grade 5. They are usually either percentage decrease - working out the normal price, if you know the sale price of an item - or percentage increase, such as property prices. Here's the questions, which are fairly representative of the types of reverse percentage questions usually asked: 1. In a sale, … [Read more...]

These videos are examples of the 'finding the missing angle' types of questions. They can be a little challenging, although I hope that the examples will give you an overview of the range of GCSE maths problems. Unfortunately there isn't really a specific topic; these problems are more about solving. You might need circle theorems, and also properties of regular polygons - … [Read more...]

 These videos are examples of compound interest type questions - now called 'growth and decay.' George invested £3200 in a savings account for 3 years. He was paid compound interest at a rate of 3.5% per annum. Work out how much was in the account after 3 years? Tony invested £4500 for 3 years. He was paid 4% per annum compound interest. Calculate the total … [Read more...]

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...]