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Logical Crossnumber Puzzles

George Ho

出版	Xlibris Corporation LLC, 2019-11-21
主題	Young Adult Nonfiction / Mathematics / General
ISBN	17960078629781796007862
URL	http://books.google.com.hk/books?id=pUgCzAEACAAJ&hl=&source=gbs_api

註釋

The book enhances the structure and contents of the old Crossnumber puzzles by making their clues clearer, easily and quickly understood, the numbers easily located and relationships between numbers easily described.The book has 50 puzzles of 5 levels of difficulty, covering sophisticated mathematical knowledge, not just simple arithmetical relations between numbers, making the solving of the puzzles more challenging and more useful to the development of the brain and the acquisition of mathematical abilities.