For phone numbers, prices, ages, dates — everywhere.
0 to 20 in French. Most are simple single words; the trickier ones are onze (11), douze (12), treize (13), quatorze (14), quinze (15), seize (16) which all end in -ze. From 17 onwards they're built compositionally: dix-sept (10+7), dix-huit (10+8), dix-neuf (10+9). Vingt = 20. Watch out for: deux (2) sounds like de; six (6) and dix (10) have a final S sound when alone, but go silent before a consonant.
You'll hear each number spoken once. Pick the matching digit from four choices.