Unlike the numbers from 3-10, which are followed by a plural noun, the numbers from 11-1000 must be followed by a singular noun. In formal Arabic, you will see nouns following numbers 11-99 written with ending.

Trans		Number		Sound
aHada-‘ashar		11
ethanaa-‘ashar		12
thalata-‘asahar		13
arba’ata-‘asahar		14
khamsta-‘asahar		15
settata-‘asahar		16
sab’ata-‘asahar		17
thamanyata-‘asahar		18
tes’ata-‘asahar		19
‘eshrun		20
wahed wa ‘eshrun		21

Trans		Number		Sound
ethnaane wa ‘eshrun		22
thalaatha wa ‘eshrun		23
thalaatun		30
arba’un		40
kamsun		50
settun		60
sab’un		70
thamaanun		80
tes’un		90
me’’a (meya)		100