The reason why BCG potential test is so difficult is because of the time constraint.
So what I did was work on any questions from the BCG potential test I could find and try to solve them super quickly. For example, this question should be solved in 30 seconds
"One of the biggest global airlines has decided to buy new aircrafts. The ratio of first class, business and economy seats in the new aircrafts will be 1 to 3 to 8 and the total number of seats will be 240.
Average ticket prices for popular destinations are expected to be €700 for first class, €300 for business and €150 for economy. The average duration of these flights is 3 hours.
First and business customers get free Wi-Fi on board but economy customers need to pay €2 / hour to use Wi-Fi.
Assuming that only 5% of economy customers use Wi-Fi all the time, what are the expected revenues from a flight to a popular destination using a new aircraft at its full capacity?
Good luck on the test!