un des meilleurs
you are the best is translated in French as "tu es le / la meilleur(e)"
meilleurs amis
Fear no one is "ne crains personne" in French.
Tu es le meilleur.
The word for 21 in French is vingt-et-un.
One hundred and two in French would be Cent et deux.
Soixante-dix des
The closest I can get is good luck which translated as "Bonne chance."
un beau jour
on devrait acheter lequel?
Like this ===> 143
Are you stupid- 162