“Number Trick,” Friend, Feb. 1976, 26
Number Trick
It is surprising how many people you can catch with this trick. Without warning, suddenly hand someone a pencil and a piece of paper and ask him to write down in figures, as quickly as possible, TEN THOUSAND, TEN HUNDRED AND TEN.
Most of your victims will fall into the trap and write 10,1010 which is not the correct answer. The ten hundred makes up another thousand, so the answer written correctly is 11,010.