THE EFFECT: The magician writes down the names of four different fruits on four pieces of paper. The magician folds them up and asks a spectator to choose one of the four papers.
The spectator is asked to remember the fruit but not to tell the magician. The magician closes his eyes and says the name of the fruit is "mango" and it's the correct answer!
THE SECRET: When you write the names of the different fruits actually write one fruit on all four pieces of paper. However as you write pretend to be writing different words.
For example write "mango" on all the pieces of paper. So whichever the spectator chooses the answer will always be mango.
TIP: After the spectators chooses one of the papers immediately get the other three pieces of paper and put them in your pocket. If not the spectator may well see you have written the same on the others.
You can have a duplicate set of papers with different fruits written on and switch them in your pocket to make the performance that much more amazing!