HISTORIANS of mathematics attribute the first use of the cross x as a symbol for multiplication to William Oughtred (“Clavis Mathematicae”, London, 1631). See W. W. R. Ball's “Short Account ...

So there are similarities as well as differences. Lam King-fui, 15, Carmel Bunnan Tong Memorial Secondary School: The math symbol in my family is the division sign (÷) . In my family, everyone ...