Here are some riddles to make you think:
1) Four men were rowing a boat in the middle of a lake when it tipped over and they fell in. Not one single man got wet. How is that possible?

2) Frank was staring through the dirty 22nd story window of an office building when he became overcome with depression, slid the window open and jumped through. It is a shear drop from the window to the ground, yet when he landed he was miraculously uninjured. How is that possible?

3) How many times can you subtract the number 5 from 25?

4) Take one out and scratch my head. I am now black but once was red. What am I?
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Answers:
1) All four were married, not single.

2) Frank was a window-washer on the outside of the building looking in.

3) Once - then it becomes 20.

4) A match.