How do you say six in French?

"six" (English) = "six" (French)

I have six Apples = J'ai six pommes.

Pronouncing it is a bit tricky. By itself, it is pronounced "seess". But "six pommes" is pronounced "see pum" (you drop the final consonant sound of "six"--this is a convention that only applies to the numbers 5, 6, 8, and 10--cinq, six, huit, and dix). On the other hand, if the noun starts with a vowel then you make the liaison: six euros sounds like "see zuh-roh"