French language Q&A Forum

I have a question about the number one in front of larger numbers. Is One hundred million written ‘un cent milliards’, ‘une cent milliards’ or ‘cent milliards’

Hi, in “Curieuse de nature, je m'y étais aventurée !”, is “curieuse” in its feminine form (as opposed to the masculine “curieux”) because the speaker is female? Am I right in thinking that this is not influenced at all by the female word “nature”?

Pourquoi dit-on    "c'est un charmant jeune homme" au lieu de "il est un charmant jeune homme" ?

Is it possible to use "garder [le] secret" ? English is not my native language, I'm russian.

Hi, In the above lessons we are led to believe that "accun(e) d'entre ils/elles is interchangeable with aucun(e) ne/n'. Yet I am marked incorrect with this question: Ces histoires ? Aucune d'entre elles n'est fiable. It says the answer is Aucune. Can someone please enlighten me?

I thought that the inclusion of ni … ni in this answer meant ‘neither Sam nor Paul’ not just ‘Sam and Paul’. Am I mistaken?

"... notre équipe allie savoir-faire professionnel et pédagogie bienveillante."  Why no definite articles for savoir-faire and pédagogie ?   Is this simply the result of the informality of an advertisement?  Thanks.