numbers quiz spanishOnline version quiz yourself on numbers by Zane Wooldridge 1 veinte a 20 b 30 c 19 d 21 2 treinta y uno a 1 b 11 c 31 d 21 3 dieciocho a 38 b 18 c 28 d 8 4 cuarenta a 6 b 44 c 4 d 40 5 vientinueve a 29 b 39 c 99 d 9