It's spreading by word of mouse around the Net, but it's too good not to share with your friends. It's a cool 1997 parlor trick that will only work this year for some reason. There are variations on the way it's presented -- adult versions and family versions.
And it always works and amazes, unless you screw up the simple arithmetic.
Advertisement - story continues below
Here's how it goes:
Step 1: Tell a friend to pick up a calculator or a pencil and paper. Have him or her pick a number from one and seven. (One variation suggests using the number of days a week you would like to have sex.)
Step 2: Multiply the number by two.
Step 3: Add five.
Step 4: Multiply by 50.
Step 5: If you have already had your birthday this year, add 1747. If you haven't add 1746.
Step 6: Subtract the four-digit year in which you were born.
When you're finished, if the arithmetic was performed flawlessly, you wil have a three-digit number. The first digit was the original number picked. The second two digits represent the person's age.