■ What is Kraepelin?

In Kraepelin, add up the adjacent numbers and answer the last digit.


For example, if the numbers are lined up with "39", then 3 + 9 = 12, so answering 2 is the correct answer.


Kraepelin consists of 15 minutes in the first half + 5 minutes in the break + 15 minutes in the second half. (If you want to train practically with this app, we recommend that you select 60 seconds 15 sets.)