Wanna know your birth number?
Here's how!

1. Write down your date of birth numerically.
For example, if your birthday is September 18, 1983, write it like this:
9 18 1983

2. Put a + sign between every number, then add them up like this:
9+1+8+1+9+8+3

3. Your total should be a two-digit number.
Add those two digits together.
Keep doing this until you get a single-digit number. For example:
3+9=12 --> 1+2=3

so what's your number?