11: Humans (Baby walks on fours, Man walks on two legs and Old man has a cane)It's the riddle of the sphinx and I already knew the answer so hey.
11: a shadow :D
What has legs but can't walk?Easypeasy
This thing all things devours:Birds, beasts, trees, flowers;Gnaws iron, bites steel;Grinds hard stones to meal;Slays king, ruins townAnd beats high mountain down.
Time
What creature has 3 legs, but cannot walk with the third one?
Male human.