Warm Up Question:

Suppose if you overtake the last person, then you are?

If you answered that you are second to last, then you are wrong again. Tell me, how can you overtake the LAST person?!

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What is black when you buy it, and red when you use it, and grey when you throw it away?	An unusual paragraph. I am curious how quickly you can find out what is so unusual about it? It looks so plain you would think nothing was wrong with it! In fact, nothing is wrong with it! It is unusual though. Study it, and think about it, but you still may not find anything odd. But if you work at it a bit, you might find out! Try to do so without any coaching?