By BBC
By Andrew K. McCormick, Arthur E. Baillie
By Malcolm Bradley, Susan Gardner
By Jones, Mary, Tingle, Mike, Petheram, Louise, Gadd, Ken
By Gadd Ken
By Arnold, Brian, Jones, Mary, Jones, Geoff, Poole, Emma
By Various
By Sherry, Chris, Smiles, Louise, Mitchell, Sandra, Daniels, Ann
By CGP Books
By Collins GCSE
By Angela Royston
By The MEW Group
By Stephanie Grant, Lynn Pharaoh
By Ian Mercer
By B Taylor
By R Hunter
By Nimenko Gloria Parkes, Keith Howard, Alan Baker, Rebecca Ferguson
By School Mathematics Project
By B. J. Knapp
By Neil Short
By Rick Turton
By Chris Oxlade
By Robin Kerrod
By K Whyman
By Ian Rohr