Numeroj

Numbers

Esperanto numbers are "naked" roots; they have no grammatical endings (even when a direct object). You only have to learn about a dozen words to count to a million!

 1 unu      11 dek unu     21 dudek unu       200 ducent
 2 du       12 dek du      22 dudek du        500 kvincent
 3 tri      13 dek tri     23 dudek tri      1000 mil
 4 kvar     14 dek kvar    30 tridek         5000 kvin mil
 5 kvin     15 dek kvin    40 kvardek       10000 dek mil
 6 ses      16 dek ses     50 kvindek     1000000 miliono
 7 sep      17 dek sep     60 sesdek
 8 ok       18 dek ok      70 sepdek         1998 mil nauxcent
 9 naux     19 dek naux    80 okdek               nauxdek ok
10 dek      20 dudek       90 nauxdek
                          100 cent              0 nulo

The ordinal numbers, such as "first", "second", etc., are simply the adjectival form of the numbers. You've seen them at the beginning of each lesson:

 first unua    third tria    forty-ninth kvardek-nauxa (*)
second dua    fourth kvara    thousandth mila

contents

Information provided by the Esperanto HyperCourse Maintainer as part of the Esperanto HyperCourse.