The world's 200 hardest brain teasers : mind-boggling puzzles, problems, and curious questions to sharpen your brain /

Gruber, Gary R.

The world's 200 hardest brain teasers : mind-boggling puzzles, problems, and curious questions to sharpen your brain / The world's two hundred hardest brain teasers : mind-boggling puzzles, problems, and curious questions to sharpen your brain / - xiv, 188 pages : illustration ; 20 cm

9789833832170 (paperback)


Logic puzzles.
Logic puzzles.
Word games

GV1493 / G38

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