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Wally Koval
Thomas Pavitte
Tom Howey
Summersdale Publishers
Ellie Dix
Mark Wilson
Gary Wigglesworth
Anon
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Laurence King Publishing, Saskia Gwinn
Dieter Gebhardt, Geert Hellings, Wei - Hwa, David Singmaster, Jerry Slocum
Various
Zachary Woodard
Ivan Moscovich
Adam Simpson
Robb Pearlman
Ivan Brett
Emma Aguado
Gemma Correll
Abbie Salny, Mensa Mensa
David Gauntlett, Valeria Duarte Reyes
Noble Smith
Royal Observatory Greenwich, Gareth Moore
Michelle Morgan
Gareth Moore
Mark Huckvale
Graham Burgess
Adrienne Raphel
Quiz Book
James Pitts
Anja Brunt
Kate Freeman
Alan Stillson
Debora Robertson
Mac King, Bill King
Lisa den Teuling
Anonymous
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