1. Choose an operation: 2. Choose numbers from 0 to 12:
  Choose high number:

Choose low number:

   
3. When you're ready, click . To stop, click .
   
 

4. Enter the answer and click "Check Answer":

 =

 
   
seconds remaining answered correctly answered incorrectly

Click here if you would like to download this file to your
computer and practice your math facts offline.

Created 1998 by David Baurac
Office of Public Affairs, Argonne National Laboratory

 
 
How many computer-generated arithmetic problems can you answer in 60 seconds?