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  2. Kaktovik numerals - Wikipedia

    en.wikipedia.org/wiki/Kaktovik_numerals

    30,561 10 3,G81 20 ÷ ÷ ÷ 61 10 31 20 = = = 501 10 151 20 30,561 10 ÷ 61 10 = 501 10 3,G81 20 ÷ 31 20 = 151 20 ÷ = (black) The divisor goes into the first two digits of the dividend one time, for a one in the quotient. (red) fits into the next two digits once (if rotated), so the next digit in the quotient is a rotated one (that is, a five). (blue) The last two digits are matched once for ...

  3. Chisanbop - Wikipedia

    en.wikipedia.org/wiki/Chisanbop

    Counting from 1 to 20 in Chisanbop. Each finger has a value of one, while the thumb has a value of five. Therefore each hand can represent the digits 0-9, rather than the usual 0-5. The two hands combine to represent two digits; the right hand is the ones place, and the left hand is the tens place.

  4. Vigesimal - Wikipedia

    en.wikipedia.org/wiki/Vigesimal

    In a vigesimal place system, twenty individual numerals (or digit symbols) are used, ten more than in the decimal system. One modern method of finding the extra needed symbols is to write ten as the letter A, or A 20, where the 20 means base 20, to write nineteen as J 20, and the numbers between with the corresponding letters of the alphabet.

  5. Welsh numerals - Wikipedia

    en.wikipedia.org/wiki/Welsh_numerals

    The traditional counting system used in the Welsh language is vigesimal, ... 20 ugain: dau ddeg: 21 un ar hugain ("one on twenty") dau ddeg un: 22 dau/dwy ar hugain:

  6. Court cracks down on California agency that denied Musk ...

    www.aol.com/news/court-cracks-down-california...

    (The Center Square) – A California court cracked down on the California Coastal Commission for its “prejudicial abuse of discretion” when denying homebuilding permits. The same agency ...

  7. Maya numerals - Wikipedia

    en.wikipedia.org/wiki/Maya_numerals

    The "Long Count" portion of the Maya calendar uses a variation on the strictly vigesimal numerals to show a Long Count date. In the second position, only the digits up to 17 are used, and the place value of the third position is not 20×20 = 400, as would otherwise be expected, but 18×20 = 360 so that one dot over two zeros signifies 360.

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