Q-challenge Brainbusters
by Harold Gale
ISBN 13: 9780859854757
Format: Hardcover (32 pages) Publisher: Price Stern Sloan,US Published: May 1988
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Oracle Mind Games and Puzzles
ISBN 13: 9781872122304
Format: Paperback (96 pages) Publisher: Mensa Publications Ltd Published: 27 Apr 1990