Answer:
What was the longest river in the world before the Amazon River was discovered?
What coin doubles in value when half is deducted?
You are participating in the swimming finals at the Olympics. In the final few seconds of the race you narrowly pass the swimmer who was in third place. What place did you get?
An archaeologist digs up two perfectly preserved bodies. He immediately identifies them as Adam and Eve. How can he tell they are Adam and Eve?
An archaeologist unearths a coin bearing the inscription "57BC". How does he instantly know that it's a forgery?
I appear in the morning. But am always there. You can never see me. Though I am everywhere. By night I am gone, though I sometimes never was. Nothing can defeat me. But I am easily gone.