Understanding Cardinal Numbers in Latin

Latin numbers are usually adjectives. When there are three forms, the Latin number has a masculine, feminine, and neuter form, in that order. The numbers follow the appropriate declension rules. Note that there is no singular form for most of the numbers and no plural form for the number 1. Numbers 1 - unus, una, unum 2 - duo, duae, duo 3 - tres, tres, tria 4 - quattuor 5 - quinque 6 - sex 7 - septem 8 - octo 9 - novem 10 - decem 11 - undecim 12 - duodecim 13 - tredecim 14 - quattuordecim 15 - quindecim 16 - sedecim 17 - septendecim 18 - duodeviginti 19 - undeviginti 20 - viginti 21 - viginti unus 30 - triginta 40 - quadraginta 50 - quinquaginta 60 - sexaginta 70 - septuaginta 80 - octoginta 90 - nonaginta 100 - centum 200 - ducenti, ducentae, ducenta 300 - trecenti, trecentae, trecenta 400 - quadrigenti, quadrigentae, quadrigenta(*) 500 - quingenti, quingentae, quingenta 600 - sescenti, sescentae, sescenta 700 - septingenti, septingentae, septingenta 800 - octingenti, octingentae, octingenta 900 - nongenti, nongentae, nongenta 1000 - mille 2000 - duo milia Counting Numbers Eng Latin French Italian Spanish 1 one unus un uno uno 2 two duo deux due dos 3 three tres trois tre tres 4 four quattuor quatre quattro cuatro 5 five quinque cinq cinque cinco 6 six sex six sei seis 7 seven septem sept sette siete 8 eight octo huit otto ocho 9 nine novem neuf nove nueve 10 ten decem dix dieci diez