Numbers in International Auxiliary languages languages

	Esperanto	Interlingua	Lingua Franca Nova	Folkspraak	Volapük
0	nulo	zero	zero	nut	ser
1	unu	un	un	en	bal
2	du	duo	du	twae	tel
3	tri	tres	tre	dre	kil
4	kvar	quatro	cuatro	fier	fol
5	kvin	cinque	sinco	femf	lul
6	ses	sex	ses	sex	mäl
7	sep	septe	sete	seven	vel
8	ok	octo	oto	acht	jöl
9	naŭ	nove	nove	nen	zül
10	dek	dece	des	tien	deg
11	dek unu	dece-un	des un	elf	degbal
12	dek du	dece-duo	des du	twaelf	degtel
13	dek tri	dece-tres	des tre	dretien	degkil
14	dek kvar	dece-quatro	des cuatro	fiertien	degfol
15	dek kvin	dece-cinque	des sinco	femftien	deglul
16	dek ses	dece-sex	des ses	sextien	degmäl
17	dek sep	dece-septe	des sete	seventien	degvel
18	dek ok	dece-octe	des oto	achttien	degjöl
19	dek naŭ	dece-nove	des nove	nentien	degzül
20	dudek	vinti	dudes	twaentig	teldeg
21	dudek unu	vinti-un	dudes-un	en-ond-twaentig	teldegbal
22	dudek du	vinti-duo	dudes-du	twae-ond-twaentig	teldegtel
30	tridek	trenta	trides	dretig	kildeg
40	kvardek	quaranta	cuatrodes	fiertig	foldeg
50	kvindek	cinquanta	sincodes	fumftig	luldeg
60	sesdek	sexanta	sesdes	sextig	mäldeg
70	sepdek	septanta	setedes	seventig	veldeg
80	okdek	octanta	otodes	achttig	jöldeg
90	naŭdek	novanta	novedes	nentig	züldeg
100	cent	cento	sento	hondrad	tum
1000	mil	mille	mil	tusend	mil
	Esperanto phrases	Interlingua phrases	Lingua Franca Nova phrases		Volapük phrases

Esperanto recordings by Jan Jurčík

Esperanto ordinal numbers are formed by adding a to the cardinal numbers, eg. unua, dua, tria, etc.
Interlingua ordinal numbers are: 1st prime; 2nd secunde; 3rd tertie; 4th quarte; 5th quinte; 6th sexte; 7th septime; 8th octave; 9th none; 10th decime; last ultime. The suffix -isime is added to other numbers, eg. vintesime (20th), trentesime (30th), centesime (100th).
To form ordinal numbers in Folkspraak add the suffix -de, eg. tiende (10th), elfde (11th), twae-ondfiertigde (42nd).
In Volapük ordinal numbers are formed with the suffix -id.

Sources