Actualy this works best as a practical joke;
With the most intelligent look on your face you write a row of numbers (doesn't matter which numbers) like; 5 , 17, 34, 69 , 72 and say to your audience; Which number doesn't belong in this row?
They will start counting,trying to find a pattern, but no one will come up with the right answer;
number 34! (or any other number); because all the other numbers come with rice, and number 34 comes with noodles!