 Types:
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10, X, decade, ten, tenner
the cardinal number that is the sum of nine and one; the base of the decimal system

11, XI, eleven
the cardinal number that is the sum of ten and one

12, XII, dozen, twelve
the cardinal number that is the sum of eleven and one

teens
all the numbers that end in teen

13, XIII, baker's dozen, long dozen, thirteen
the cardinal number that is the sum of twelve and one

14, XIV, fourteen
the cardinal number that is the sum of thirteen and one

15, XV, fifteen
the cardinal number that is the sum of fourteen and one

16, XVI, sixteen
the cardinal number that is the sum of fifteen and one

17, XVII, seventeen
the cardinal number that is the sum of sixteen and one

18, XVIII, eighteen
the cardinal number that is the sum of seventeen and one

19, XIX, nineteen
the cardinal number that is the sum of eighteen and one

20, XX, twenty
the cardinal number that is the sum of nineteen and one

21, XXI, twentyone
the cardinal number that is the sum of twenty and one

22, XXII, twentytwo
the cardinal number that is the sum of twentyone and one

23, XXIII, twentythree
the cardinal number that is the sum of twentytwo and one

24, XXIV, twentyfour, two dozen
the cardinal number that is the sum of twentythree and one

25, XXV, twentyfive
the cardinal number that is the sum of twentyfour and one

26, XXVI, twentysix
the cardinal number that is the sum of twentyfive and one

27, XXVII, twentyseven
the cardinal number that is the sum of twentysix and one

28, XXVIII, twentyeight
the cardinal number that is the sum of twentyseven and one

29, XXIX, twentynine
the cardinal number that is the sum of twentyeight and one

30, XXX, thirty
the cardinal number that is the product of ten and three

40, XL, forty
the cardinal number that is the product of ten and four

50, L, fifty
the cardinal number that is the product of ten and five

60, LX, sixty
the cardinal number that is the product of ten and six

70, LXX, seventy
the cardinal number that is the product of ten and seven

78, LXXVIII, seventyeight
the cardinal number that is the sum of seventy and eight

80, LXXX, eighty, fourscore
the cardinal number that is the product of ten and eight

90, XC, ninety
the cardinal number that is the product of ten and nine

100, C, century, hundred, one C
ten 10s

144, gross
twelve dozen

120, great hundred, long hundred
the cardinal number that is the product of ten and twelve

500, D, five hundred
the cardinal number that is the product of one hundred and five

1000, G, K, M, chiliad, grand, one thousand, thou, thousand, yard
the cardinal number that is the product of 10 and 100

1728, great gross
a cardinal number equal to one dozen gross

10000, myriad, ten thousand
the cardinal number that is the product of ten and one thousand

100000, hundred thousand, lakh
the cardinal number that is the fifth power of ten

1000000, meg, million, one thousand thousand
the number that is represented as a one followed by 6 zeros

crore
the number that is represented as a one followed by 7 zeros; ten million

1000000000, billion, one thousand million
the number that is represented as a one followed by 9 zeros

1000000000000, billion, one million million
the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen

1000000000000, one million million, trillion
the number that is represented as a one followed by 12 zeros

one million million million, trillion
the number that is represented as a one followed by 18 zeros

quadrillion
the number that is represented as a one followed by 15 zeros

quadrillion
the number that is represented as a one followed by 24 zeros

quintillion
the number that is represented as a one followed by 18 zeros

sextillion
the number that is represented as a one followed by 21 zeros

septillion
the number that is represented as a one followed by 24 zeros

octillion
the number that is represented as a one followed by 27 zeros

alephnought, alephnull, alephzero
the smallest infinite integer

boxcars
(usually plural) an expression used when two dice are thrown and both come up showing six spots

millenary
a sum or aggregate of one thousand (especially one thousand years)

milliard
a billion