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Birthdate Zinger
Sent in by: Molly of Concord, MA

Amaze your friends with how much you know...about them!

You'll need a pencil and a piece of paper.

Here's a neat trick that will show you your birth date. You can use this riddle to figure out your friends' birthdays (without them even telling you).

Try this on your own or tell your friends to:

Write down the number of the month you were born.

Multiply by 4.

Add 13.

Multiply by 25.

Subtract 200.

Add the day of the month you were born.

Multiply by 2.

Subtract 40.

Multiply by 50.

Add the last two digits of the year you were born.

Subtract 10,500.

The answer will be your birth date!