Here's a range of GCSE practice papers by grade. View YouTube videos here for help. I'll add the answer papers soon, although I'm sure you're working through plenty of practice exam papers. Here's 6 tips to help you answer maths word problems and developing independent learning skills. You never know, you might be heading for one of 10 seriously brilliant maths careers! Grade … [Read more...]
How to work out the volume of a cone and hemisphere
How to work out the volume of a cone and hemisphere - or an ice cream! These are really higher level grade A / B GCSE questions but: - the formulas are given on the exam paper (although you should learn them :-)) and - if you work through logically it should be straightforward. The questions usually involve calculating a volume of a cone, sphere or hemisphere. There might … [Read more...]
Why and how to work out volume of a prism
Learning how to work out volume of a prism can be very important for all sorts of applications - mainly in manufacturing and transportation. A 'prism' is a shape with a constant cross section, such as a cardboard box. It basically means that if you cut the prism in half the shape will be the same in the middle: Try the Quick Test volumes of 3D shapes To work out the … [Read more...]
Why and how to calculate density
How to calculate density can be very important in design and construction.. Density is measured by how much something weighs for a fixed volume, usually a 1cm cube. It's a measurement that compares different materials of the same size. This is a level C GCSE question: "An 8cm solid hexagonal prism has a cross-section area of 15cm squared. The prism is made from wood … [Read more...]
Why and how to use stratified sampling
Stratified sampling is all about using a smaller sample to collect data .. and then using the information to make conclusions about the whole population. It's usually cheaper and quicker - so, if you want to find out how many students, in a high school, like football - you can just ask a few and decide the outcome. That's the theory... but there is a bit of a problem. Suppose … [Read more...]