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The Magic Bird

Here's a question I was asked as part of an interview:

Two cars, A and B, enter the same tunnel from opposite ends. The tunnel is 200 km long. The cars are each going 100 km/h. A magical bird takes off from car A and flies at 1000 km/h towards car B. When it reaches car B, it immediately turns around and flies back to car A. When it reaches car A, it turns around and flies back to car B, etc.. The bird keeps flying back and forth until the cars collide, killing everyone, including the bird.

How far did the bird fly ?

Launch!

I just downloaded a game, "Dragon Age: Origins" from Steam. I went to launch the game and Steam gave me a little window with three choices:

  1. Launch Dragon Age: Origins
  2. Launch Dragon Age: Origin's Launcher
  3. View Support Information

I'm pretty sure I'm going to try the first option, because the second one sounds like the first step in an infinite loop.