Mathematical Puzzles, for Beginners and Enthusiasts
This is a delightful collection of head-scratchers all described in an easy-going format. Puzzles (all of them are word puzzles, and all answers appear at the back) are grouped as algebraic, geometric, easy-arithmetical, combinatoric, puzzles about integers, etc.; none are trivial, some are extremely challenging, and they all teach some point about inference or mathematical method. In the preface, the author writes, "Some of these puzzles are old favorites...
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Berlitz teaches languages using Berlitz Method of Language Instruction. This "method" pioneered the direct method and what later became popularized as the audio lingual method.
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