noventa y nueve
You spell the number 12 in spanish "doce." You should always spell this number in word form if you plan to use it at the beginning of a sentence, such as "Doce minutos?"
Cuarenta
It is "Doscientos"
Ciento dos
The number eleven is spelled 'once' (awn-say) in Spanish.
The number 5200 is cinco mil doscientos.
Treinta y cinco
The number fifteen (15) is quince.quince
sesenta y cinco
mil seiscientos veintitrés
The number 270 is "doscientos setenta."
sesenta y tres