Your Age!

Think of a number between 1 and 10
Double it
Add 5
Multiply by 50
If you have already had your birthday this year add 1760, if not add 1759
Now subtract the year that you were born (4 digits)
You now have a 3 digit number
The first digit is your original number
The next 2 digits are your age.

This will only work during the year 2010!