The plural of formula is formulae. A formula is a mathematical rule or relationship that uses letters to represent amounts which can be changed – these are called variables. For example, the formula ...

The subject of a formula is the variable that is being worked out. It can be recognised as the letter on its own on one side of the equals sign. For example, in the formula for the area of a rectangle ...

Students have launched a petition calling maths A level exams 'completely unreasonable' after struggling to answer questions on this year's test. Hundreds have already signed the petition while many ...

A further maths A-level paper due to be sat by around 7,000 students on Thursday has been replaced following the leak of an earlier exam. A cheating probe was launched last week after images of an ...