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Kakuro or Kakkuro or Kakoro (Japanese: カックロ) is a kind of logic puzzle that is often referred to as a mathematical transliteration of the crossword. Kakuro puzzles are regular features in many math-and-logic puzzle publications across the world.
In Japanese, each digit/number has at least one native Japanese (), Sino-Japanese (), and English-origin reading.Furthermore, variants of readings may be produced through abbreviation (i.e. rendering ichi as i), consonant voicing (i.e sa as za; see Dakuten and handakuten), gemination (i.e. roku as rokku; see sokuon), vowel lengthening (i.e. ni as nii; see chōonpu), reading multiple digits ...
The number 9 is also considered unlucky; when pronounced ku, it is a homophone for suffering (苦). The number 13 is sometimes considered unlucky, though this is a carryover from Western tradition. In contrast, 7 and sometimes 8 are considered lucky in Japanese. [2] In modern Japanese, cardinal numbers except 4 and 7 are generally given the on ...
Crossword-like puzzles, for example Double Diamond Puzzles, appeared in the magazine St. Nicholas, published since 1873. [31] Another crossword puzzle appeared on September 14, 1890, in the Italian magazine Il Secolo Illustrato della Domenica. It was designed by Giuseppe Airoldi and titled "Per passare il tempo" ("To pass the time"). Airoldi's ...
'digit-single'; originally called Number Place) [1] is a logic-based, [2] [3] combinatorial [4] number-placement puzzle. In classic Sudoku, the objective is to fill a 9 × 9 grid with digits so that each column, each row, and each of the nine 3 × 3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contains all of the ...
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The Japanese ri is now much longer than the Chinese or Korean li, comprising 36 chō, 2160 ken, [15] or 12,960 shaku. A still longer unit was formerly standard in Ise on Honshu and throughout the 9 provinces of Kyushu , which comprised 50 chō , 3000 ken , [ 15 ] or 18,000 shaku .
There are different genres of puzzles, such as crossword puzzles, word-search puzzles, number puzzles, relational puzzles, and logic puzzles. The academic study of puzzles is called enigmatology . Puzzles are often created to be a form of entertainment but they can also arise from serious mathematical or logical problems.