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In addition to the importance of three and nine, Simek highlights the importance of the number 27 (27/3=9) for the Germanic lunar calendar. [8] Scholars Mindy MacLeod and Bernard Mees note that, "the number nine plays a significant role in Germanic folklore: charms frequently contain nine ingredients or specify a ritual to be performed nine times".
[4] [5] The number 13. Fear of the number 13 is known as triskaidekaphobia. The number 17. Fear of the number 17 is known as heptadecaphobia and is prominent in Italian culture. [6] The number 39. Fear of the number 39 is known as the curse of 39, especially in Afghan culture. [7] The number 43.
The period of the sequence, or order of the set of sociable numbers, is the number of numbers in this cycle. If the period of the sequence is 1, the number is a sociable number of order 1, or a perfect number—for example, the proper divisors of 6 are 1, 2, and 3, whose sum is again 6.
In the Torah portion Bamidbar, the outer framework of the original composition is still recognizable. There are five sections, containing five homilies or fragments, taken from the Tanchuma on Numbers 1:1, 2:1, 3:14, 3:40, and 4:17, which are expanded by some very discursive additions. As Tanchuma only addresses the first verses of each chapter ...
The Natural Area Code, this is the smallest base such that all of 1 / 2 to 1 / 6 terminate, a number n is a regular number if and only if 1 / n terminates in base 30. 32: Duotrigesimal: Found in the Ngiti language. 33: Use of letters (except I, O, Q) with digits in vehicle registration plates of Hong Kong. 34
In the Etruscan system, the symbol 1 was a single vertical mark, the symbol 10 was two perpendicularly crossed tally marks, and the symbol 100 was three crossed tally marks (similar in form to a modern asterisk *); while 5 (an inverted V shape) and 50 (an inverted V split by a single vertical mark) were perhaps derived from the lower halves of ...
Presumably, this is because 360 is roughly the number of days in a year. (The Maya had however a quite accurate estimation of 365.2422 days for the solar year at least since the early Classic era .) [ 5 ] Subsequent positions use all twenty digits and the place values continue as 18×20×20 = 7,200 and 18×20×20×20 = 144,000, etc.
There usually are fewer 2-digit Friedman numbers than 3-digit and more in any given base, but the 2-digit ones are easier to find. If we represent a 2-digit number as mb + n, where b is the base and m, n are integers from 0 to b−1, we need only check each possible combination of m and n against the equalities mb + n = m n, and mb + n = n m to see which ones are true.