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120 is . the factorial of 5, i.e., ! =.; the fifteenth triangular number, [2] as well as the sum of the first eight triangular numbers, making it also a tetrahedral number. 120 is the smallest number to appear six times in Pascal's triangle (as all triangular and tetragonal numbers appear in it).
Forty-fives (also known as auction forty-fives, auction 120s, 120, and growl) is a trick-taking card game that originated in Ireland. The game is popular in many communities throughout Atlantic Canada ( New Brunswick , Newfoundland , Nova Scotia , Prince Edward Island ) as well as the Gaspé Coast in Québec .
Every positive integer can be expressed as the sum of at most 19 fourth powers; every integer larger than 13792 can be expressed as the sum of at most 16 fourth powers (see Waring's problem). Fermat knew that a fourth power cannot be the sum of two other fourth powers (the n = 4 case of Fermat's Last Theorem; see Fermat's right triangle theorem ...
Dunbar's number has become of interest in anthropology, evolutionary psychology, [12] statistics, and business management.For example, developers of social software are interested in it, as they need to know the size of social networks their software needs to take into account; and in the modern military, operational psychologists seek such data to support or refute policies related to ...
Fred Hemmings reviewed the original self-published version of Fourth Dimension for White Dwarf #3, giving it an overall rating of 7 out of 10, and stated that "unless you can't stand purely cerebral games I would recommend the purchase of 4D." [3] Andy Davis reviewed 4th Dimension in The Space Gamer No. 35. [1]
An elevator control panel in a residential apartment building in Shanghai with no floor numbered as the 4th The number 4 missing in a parking lot in Japan. Tetraphobia (from Ancient Greek τετράς (tetrás) 'four' and Ancient Greek φόβος (phóbos) 'fear') is the practice of avoiding instances of the digit 4.