Probability tree diagrams are just a picture.. .. that show all the possible outcomes from a series of events. They can be quite useful as probability needs some careful thought. Watch the video and download the quick test - good luck! This video deals with a GCSE question: There are 3 strawberry yoghurts and 4 peach yoghurts in a fridge. Kate takes a yoghurt at random … [Read more...]
How to solve linear equations with video examples
How to solve linear equations .. some of them you'll solve without really thinking about! Suppose you bought a CD for £8 and then two books at the same price. The total cost is £25 and, with a little bit of arithmetic, you might work out the price of each book is £8.50. Mathematicians like to call these "linear equations" and they look something like: 2B + 8 = 25 (where 'B' … [Read more...]
6 tips on how to answer maths word problems
The hardest thing about how to answer maths word problems is reading the English and translating it into mathematics. It's also more difficult when the words start to swim and anything, even an hour's extra maths lesson, is preferable.. Practical maths word problems are essentially written as a 'real life' situation. Some are hilarious: my favourite being an actual GCSE … [Read more...]
Why and how to work out the volume of a cylinder
How to work out the volume of a cylinder is typically a grade C GCSE question.. GCSE Grade C question to calculate the volume of a cylinder with a radius of 3cm and a height of 4cm. How to work out the volume of a can of coke. Just a quick video to calculate if 330ml is accurate. It is... but my estimation shows 380ml ! I've not allowed for the coke can design and not … [Read more...]
How to change repeating decimals to fractions proof
Repeating decimals to fractions.. .. is a favourite GCSE question, usually level A and worth around 2/4 marks. A repeating decimals to fractions question is a little more 'abstract' but, once you understand the principles, it should be relatively straightforward. The answer is to use algebra to show a formal proof. As with most mathematics aim for a logical progression with … [Read more...]