Lateral Thinking Puzzles: Colour Edition - Kindle edition by Clarke, R J. Humor & Entertainment Kindle eBooks @ Amazon.com.
Lateral thinking puzzles
Mathematical lateral thinking puzzles by Paul Sloane and Des MacHale, pp. 165, $6.95 (paper), ISBN 978-1-4549-1167-8, Puzzle Wright Press (2015). | The Mathematical Gazette | Cambridge Core