Solve the following series:
AZ, GT, MN, __, YB

John was piloting a plane behind a car but was never able to overtake it. Why?

What is common among 11, 69, and 88?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

What is the next number in this matchsticks series riddle?

If eleven plus two equals one, what does nine plus five equal?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

What part of Turkey has the most feathers?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?