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Latin Numbers and Roman Numerals

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unus
one
duo
two
tres
three
quattuor
four
quinque
five
sex
six
septem
seven
octo
eight
novem
nine
decem
ten
undecim
eleven
duodecim
twelve
tredecim
thirteen
quattuordecim
fourteen
quindecim
fifteen
sedecim
sixteen
septendecim
seventeen
duodeviginti
eighteen
undeviginti
nineteen
viginti
twenty
primus
first
secundus
second
tertius
third
quartus
fourth
quintus
fifth
sextus
sixth
septimus
seventh
octavus
eighth
nonus
ninth
decimus
tenth
I
1
V
5
X
10
L
50
C
100
D
500
M
1000
IX
9
XI
11
CD
400
DC
600
IV
4
VI
6
XL
40
LX
60
XC
90
CX
110