For each round, you'll see five numbers. Add (+) them sequentially: the first to the second, the second to the third, and so on. Enter your four answers into the boxes provided. For best results, take the test on a desktop computer.
After you've entered your four sums, click "Submit" to move to the next of the 10 rounds. Your speed and accuracy are being measured throughout. The 3 minute timer begins as soon as you start.
