Typically, the brainteasers on interviews on these firms would focus more on market sizing, such as how to calculate rubber needs for a target country, from the perspective of a tire manufacturer.
For this kinf of market sizing, practice how to start estimating - starting point can varid, from total number of citizens or households, then segmenting this number, before going to detailed number of how many cars and bikes each household have or if they have none and travel with public transportation. Also consider export.
A lot of practice is needed for different cases, but the most important thing is to get comfortable with the logical flow and reasonings.
Hope it helps.