Calendar Trick #1


1. Choose a 3 x 3 square on a calendar.

2. Add the nine numbers together.

3. When you give me the sum, I will tell you your middle number and the number in the upper left corner.

Enter the total here:

Click here to run again

Click here to see why it works
 
Many thanks to Jaime Garcia Ramirez for helping me with the javascript!


Send any comments or questions to: David Pleacher