I found this on Melissa's blog.
YOUR AGE BY DINER & RESTAURANT MATH
This is pretty neat
DON'T CHEAT BY SCROLLING DOWN FIRST!It takes less than a minute. Work this out as you read .
Be sure you don't read the bottom until you've worked it out!
This is not one of those waste of time things, it's fun.
1. First of all, pick the number of times a week that you would like to go out to eat.(more than once but less than 10)
2. Multiply this number by 2 (just to be bold)
3. Add 5
4. Multiply it by 50
5. If you have already had your birthday this year add 1758... If you haven't, add1757.
6. Now subtract the four digit year that you were born.You should have a three digit number
The first digit of this was your original number
(I.e., How many times you want togo out to restaurants in a week.)
The next two numbers areYOUR AGE ! ------ (Oh YES, it is!)
THIS IS THE ONLY YEAR (2008) IT WILL EVER WORK, SO SPREAD IT AROUND WHILE IT LASTS