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A ZILLION TROUBLES

http://www.worldwidewords.org/articles/numbers.htm

Number word Millions system Thousands systemmillion 6 6billion 12 9trillion 18 12quadrillion 24 15quintillion 30 18sextillion 36 21septillion 42 24octillion 48 27nonillion 54 30decillion 60 33undecillion 66 36duodecillion 72 39tredecillion 78 42quattuordecillion 84 45quindecillion 90 48sexdecillion 96 51septemdecillion 102 54octodecillion 108 57novemdecillion 114 60

vigintillion

120 63

 

SI prefix Size Derivationkilo– 3 From the Greek for “thousand” (introduced at the inception of the metric system in 1795 and retained in SI).mega– 6 From the Greek for “large; great” (also predates SI units, with occasional examples back to 1868).giga– 9 From the Greek for “giant”.tera– 12 From the Greek for “monster”.peta– 15 Seemingly an invented word based on the Greek prefix penta– (this being the fifth prefix in the series).exa– 18 Apparently derived from the Greek prefix hexa– by deleting the first letter.zetta– 21 Possibly derived from the Greek word for seven. However, it is also said to be adapted from the Italian sette, “seven”, which seems more likely.yotta– 24 Similarly either derived from the Greek octa–, or from the Italian otto, “eight”, with the last letter changed to match that of the other prefixes.

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