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 ...

Formula 1's lasting presence in the United States is impressive on paper. Three races, Fortune 100 company investment, celebrity partnerships, and streaming deals. On the ground, though, much of the ...

Verity's been grilling appliances for over 15 years, and is the Which? cooking expert. She scrutinises nearly 100 ovens, cookers, cooker hoods and hobs every year, to see which can take the heat.