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  2. Vigesimal - Wikipedia

    en.wikipedia.org/wiki/Vigesimal

    D0 20 is equivalent to two hundred and sixty in decimal = (13 × 20 1) + (0 × 20 0) 100 20 is equivalent to four hundred in decimal = (1 × 20 2) + (0 × 20 1) + (0 × 20 0). In the rest of this article below, numbers are expressed in decimal notation, unless specified otherwise. For example, 10 means ten, 20 means twenty. Numbers in vigesimal ...

  3. Maya numerals - Wikipedia

    en.wikipedia.org/wiki/Maya_numerals

    Every known example of large numbers in the Maya system uses this 'modified vigesimal' system, with the third position representing multiples of 18×20. It is reasonable to assume, but not proven by any evidence, that the normal system in use was a pure base-20 system. [6]

  4. Multiple (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Multiple_(mathematics)

    In mathematics, a multiple is the product of any quantity and an integer. [1] In other words, for the quantities a and b , it can be said that b is a multiple of a if b = na for some integer n , which is called the multiplier .

  5. Names of large numbers - Wikipedia

    en.wikipedia.org/wiki/Names_of_large_numbers

    20: Vigintillion 10 63: ... Multiples of this unit then became the second numbers, up to this unit taken a myriad myriad times, 10 8 ·10 8 =10 16. This became the ...

  6. Hebrew numerals - Wikipedia

    en.wikipedia.org/wiki/Hebrew_numerals

    Multiples of ten above the value 20 have no gender (20, 30, 40, ... are genderless), unless the number has the digit 1 in the tens position (110, 210, 310, ...). The lower clock on the Jewish Town Hall building in Prague , with Hebrew numerals in counterclockwise order Early 20th century pocket watches with Hebrew numerals in clockwise order ...

  7. English numerals - Wikipedia

    en.wikipedia.org/wiki/English_numerals

    In British usage, this style is common for multiples of 100 between 1,000 and 2,000 (e.g. 1,500 as "fifteen hundred") but not for higher numbers. Americans may pronounce four-digit numbers with non-zero tens and ones as pairs of two-digit numbers without saying "hundred" and inserting "oh" for zero tens: "twenty-six fifty-nine" or "forty-one oh ...

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  9. The monkey and the coconuts - Wikipedia

    en.wikipedia.org/wiki/The_monkey_and_the_coconuts

    So the morning pile, call the number n, is a multiple of 20. The pile before the last sailor woke up must have been 5/4(n)+1. If only one sailor woke up in the night, then 5/4(20)+1 = 26 works for the minimum number of coconuts in the original pile.