Answer:
If four people can repair four bicycles in four hours, how many bicycles can eight people repair in eight hours?
Even the oldest ones can be described as current, but a little mainstream.
A toy that requires some string and a breezy day
Hands she has but does not hold, teeth she has but does not bite, feet she has but they are cold, eyes she has but without sight. Who is she?
Small and bearded, both in the real world and in stories.
What is always coming but never arrives?