eBay interview questions

eBay's interviews are heavy on brainteasers and SQL if the position is for Analytics or quant focused. The initial two phone interviews were majorly on work experience, puzzles and SQLs. The in person interview was initially 5 Managers, but two more got added on the day of the interview for a 6 hour marathon interview session. The onsite interview was more focused on business cases, work experience and a bit of SQL. Overall a good experience. Eg of brainteasers - Given 4 people who each take different times to cross a bridge (10 mins, 5mins, 2mins and 1 min), what's the least amount of time taken to cross the bridge if only 2 can cross at a time and a flashlight is needed for each trip across.