we use the cambridge textbook. Id so love to burn it, except that the school owns it.
Personally i think that when it was written the writers were just trying to show off their maths skill and trying to set really hardy questions. Many questions are excessive and would never ever be asked by any sane person for any test.
Personally i think that when it was written the writers were just trying to show off their maths skill and trying to set really hardy questions. Many questions are excessive and would never ever be asked by any sane person for any test.