According to mathematical legend, Peter Sarnak and Noga Alon made a bet about optimal graphs in the late 1980s. They’ve now both been proved wrong. It started with a bet. In the late 1980s, at a ...

Save guides, add subjects and pick up where you left off with your BBC account. A time graph is a line graph which shows you data that has been collected over a period of time. There is a title ...

Save guides, add subjects and pick up where you left off with your BBC account. Inequalities are the relationships between two expressions which are not equal to one another. The symbols used for ...

The national curriculum in England is divided into four KS: KS1 Year 1–2 (ages 5–7), KS2 Year 3–6 (ages 7–11), KS3 Year ... Confounders were identified using a directed acyclic graph (online ...