LOGICAL CROSSNUMBER PUZZLES

About the Book

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.

About the Author

Dr George Ho (aka Thuan Hoa, Ho Van Hoa) graduated from University of Pedagogy in Vietnam (1962), major mathematics. He hold a Bachelor of mathematics (1965) and a Doctorate ès sciences (March 1975) at University of Sciences in Vietnam. He spent 7 years in high school teaching mathematics (1962-1969) and 10 years in Department of Theoretical Physics, University of Sciences.