Many thanks to Mr Barton for this excellent quiz.
Here is a video to help with GCSE revision. The questions come from the second half of a non calculator Foundation paper. These questions were also at the beginning of the Higher paper. They cover important topics you need to be confident with to be sure of getting a Grade C. I strongly recommend you attempt the paper yourself first and then watch the video to see if you got them right and to learn from your mistakes.
Here is the second (calculator) paper with video answers from Maths made easy.