Discover Your IQ Potential: Over 500 Tests of Your Agility
by Ken Russell, Philip J. Carter
ISBN 13: 9780572032579
Format: Paperback (128 pages) Publisher: Arcturus Publishing Published: 27 Mar 2006
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Young Genius Book of Brain Teasers (Test Your Intelligence S.)
by Philip J. Carter, Ken Russell
ISBN 13: 9780706371024
Format: Paperback (144 pages) Publisher: Cassell Illustrated Published: 29 Apr 1993