This test measures your ability to memorise and update information.
First, you will have to memorise one, two or three digits
shown simultaneously in different colours. Next, an arithmetic
operation (e.g., +4) will be presented in one of the colours of the
digits you had to memorise. Apply the arithmetic operation to the
digit of the same colour and enter the result. From now on, remember
the result you entered (and the respective colour) instead of the
original digit.