1. What animal has no wings yet will fly?
 
2. I have keys that open no locks,
    I have space, but there is no room,
   You can enter, but you can't go in.
   What am I?
  
3. There are 2 ducks in front of 2 other ducks.
   There are 2 ducks behind 2 other ducks.
   There are 2 ducks beside 2 other ducks.
   How many ducks are there?
 
4. A bus driver was heading down a street in Colorado. He went right past a stop sign without stopping, he turned left where there was a “no left turn” sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still—he didn't break any traffic laws. Why not?
 
5. A new medical building containing 100 offices had just been completed. Dave was hired to paint the numbers 1 to 100 on the doors. How many times will Dave have to paint the number nine?

1． A caterpillar1 has no wings, but will fly when it matures2 and becomes a butterfly．
2． A computer keyboard3, or typewriter4．
3． 4
4． He was walking, not driving．
5． Did you say 9 or 19 times? WRONG—twenty times．
   9,19,29,39,49,59,69,79,89,90,91,92,93,94,95,96,97,98,99
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