1. Have your friend think of a number between 1 and 100, and to keep it a secret.

2. Now, using your calculator, take your age, multiply by 2, add 5, multiply by 50, and subtract 365.

3. Next, keep that number from the last step on the calculator, hand the calculator to your friend, and tell them to add their secret number, then add 115.

4. The first half of the resulting number is your age, and the other part of the number is your friend's secret number!

Submitted by Sussy