Are you familiar with the interview process at MBB? The Bain`s Assessment is going to be very similar - the fit part, motivational and behavioral questions, case solving.
Basically, you do not have to prepare for something special. Prepare for regular round interviews.
If you have already prepared for case interviews and good at reading charts, analytical thinking, and mental math, then this test is an additional of probably an hour as what you should plan for.
Basically, to prepare you can use some mock potential test for Bain, BCG, PST (McKinsey), or GMAT, and after every test just look into a solution to see where you have gone wrong. 3-4 mock test it would be enough for you to prepare for the potential test.
Here there are 3 fresh real-live MBB Cases from different offices in the Library. Try to solve them, I think, they will be very useful for you!
For Beginner level:
Laundry Chain – Revenue Increase
For Intermediate level:
Grain Co-operative – Brand Launch
For Advanced level/the real one and used for final rounds:
Non-Profit Museum Revenue Increase
Have you tried to solve them?
What do you think - do you have any questions?
Do you need any further help?
All the best,