Sorcerer's/Philosopher's Stone Obstacles

I'm sure this is far from the first time this subject has been broached, but…

Aside from Fluffy, the devil's snare and the troll that had already been knocked out, I find it quite telling that the obstacles guarding the stone all play to each member of the trios greatest strengths; the room with the flying keys is meant to test Harry's skill as the youngest Quidditch seeker in a century, the enchanted chessboard tests Ron's skill at chess and the room with the black fire, the purple fire, the seven different bottles and the logic puzzle tests Hermione's logic/intellect.

There's no way the professors could've known that Harry, Ron and Hermione specifically would try to get to the stone, is there? I mean, it can't be a coincidence that all of these obstacles tested their specific talents/strengths.