Ebook: aha! Insight

aha! Insight challenges the reader's reasoning power and intuition while encouraging the development of "aha! reactions": those sudden, creative leaps of the mind leading to short, elegant solutions to seemingly impossible problems. A confounding collection of brain-twisters in six categories — combinatorial, geometric, numerical, logical, procedural, and verbal — this book contains puzzles to first baffle and then delight both problem-solving addicts and novices alike. Like the author's aha! Gotcha (W. H. Freeman and Company, 1982), aha! Insight grew out of a collaborative effort between Bob Tappay and Martin Gardner to enliven the learning of mathematics.