Answer:
How is it possible to always find what your looking for in the last place you look?
If you count 20 houses on your right going to the store and 20 houses on your left coming home, how many houses did you count?
A traveller moved from North to East then to West and lastly South.. What was he looking for?
An archaeologist unearths a coin bearing the inscription "57BC". How does he instantly know that it's a forgery?
What man can shave 10 times a day and still have a beard?
What is yellow, looks like the moon and has seeds?