By R.J. Edwards
By Chambers
By Telegraph Group Limited
By The Times Mind Games
By Collins Dictionaries, Collins Puzzles
By Ivy Press
By Publications International ltd, Brain Games
By Dr. Gareth Moore, Mensa Ltd
By The Mail On Sunday
By Daily Mail
By Igloo Books
By Collins Dictionaries
By Compiled By Barbour Staff
By G. T. Karber
By Elaine Higgleton, Catherine Schwarz
By Steve Curtis
By Alan Cash
By Preston, Charles
By The Times Mind Games, Richard Browne
By Telegraph Media Group Ltd
By Coleman, James A.