They come out at night without being called, and are lost in the day without being stolen. What are they?

They come at night without being called and are lost in the day without being stolen. What are they?
Show Answer            Hide AnswerStars.

 

They come out at night without being called, and are lost in the day without being stolen. What are they?
Show Answer            Hide AnswerStars.

 

This is an unusual paragraph. I'm curious as to just how quickly you can find out what is so unusual about it. It looks so ordinary and plain that you would think nothing was wrong with it. In fact, nothing is wrong with it! It is highly 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!
Show Answer            Hide AnswerThe letter E, which is the most common letter used in the Englishlanguage, does not appear in the paragraph.

 

This logic puzzle was published in Martin Gardner's column in the Scientific American. You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?
Show Answer            Hide AnswerYou can hang the iron rods on a string and watch which one turns to the north (or hang just one rod).
Gardner gives one more solution: take one rod and touch with its end the middle of the second rod. If they get closer, then you have a magnet in your hand.
The real magnet will have a magnetic field at its poles, but not at its center. So as previously mentioned, if you take the iron bar and touch its tip to the magnet's center, the iron bar will not be attracted. This is assuming that the magnet's poles are at its ends. If the poles run through the length of the magnet, then it would be much harder to use this method.
In that case, rotate one rod around its axis while holding an end of the other to its middle. If the rotating rod is the magnet, the force will fluctuate as the rod rotates. If the rotating rod is not magnetic, the force is constant (provided you can keep their positions steady).

 

This old one runs forever, but never moves at all. He has neither lungs nor throat, but still a mighty roaring call. What is it?
Show Answer            Hide AnswerWaterfall.

 

This runs fore to aft on one side of a ship, and aft to fore on the other. What is it?
Show Answer            Hide AnswerThe name of the ship

 

This thing was here since the world began yet it is never more than one month old. What is It?
Show Answer            Hide AnswerMoon.

 

Three lives have I. Gentle enough to soothe the skin. Light enough to caress the sky. Hard enough to crack rocks. What am I?
Show Answer            Hide AnswerWater.

 

Three men were in a boat. It capsized, but only two got their hair wet. Why? 
Show Answer            Hide AnswerOne was bald.

 

Three sailors fell overboard, but only one got his hair wet. What happened?
Show Answer            Hide AnswerThe other two were bald.