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A Game of Numbers
Believe it or not, number puzzles first appeared in newspapers in the late 19th century when French puzzle setters began experimenting with removing numbers from Magic Squares. They have been refined over the years and today, the best known examples of these number puzzles are Sudoku and Kakuro.
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SUDOKU... ...is a logic-based number placement puzzle. The word Sudoku derives from the Japanese phrase "Suji wa dokushin ni kagiru", meaning "the numbers must be single" or "the numbers must occur only once". Sudoku as we know it today was developed by an American architect, Howard Garns, in 1979 and was first published by Dell Magazines under the name "Number Place". It became popular in Japan in 1986 after it was published by Nikoli and given the name Sudoku. But it was not until 2005 that it became internationally popular. Try a Sudoku Puzzle
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KAKURO... ...is a kind of logic puzzle that is often referred to as a mathematical transliteration of the crossword. Dell Magazines published the first of these puzzles a decade before Sudoku, in 1966, and also came up with its original English name Cross Sums. But it is the Japanese name Kakuro, an abbreviation of the Japanese kasan kuroso (addition cross) that seems to have gained general acceptance. Try Kakuro for yourself
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