Just like in the 1-second number test, they appear on a screen and then
disappear after 4 seconds. When they disappear, the participant must write
them on his computer in the correct order, but may write them down first on
a piece of paper.

Please, note that the software allows many configurations to group the digits.

After 20 digits (the minimum to become Master), the scores can go up by
half-digits, just like in the 1-second number test.

So, for a participant to earn 21.5 digits, for example, they would have to have
earned 21 digits straight through, and then tried to do 22 or more digits and
miss by only one digit.