Calendar Trick #2

1. Choose a 2 x 2 square on a calendar.

2. Add the four numbers together.

3. When you give me the sum, I will tell you the four numbers in your square.

Enter the total here:

 
 
 

Many thanks to Jaime Garcia Ramirez for helping me with the javascript!

 

Click here to run again

Click here to see why it works