Well, seriously, you might get asked brainteaser questions like these, especially in quantitative jobs. But remember that the interviewer doesn’t necessarily want an exact number—he wants to make sure that you understand what’s being asked of you, and that you can set into motion a systematic and logical way to respond. So, just take a deep breath, and start thinking through the math. (Yes, it’s OK to ask for a pen and paper!)
Here are the 50 most frequently-asked questions that are posed in interviews. Be prepared to go into some detail about your work history; you may also be asked behavioral or situational questions which require you to provide an anecdote about how you have handled a work challenge in the past or, alternatively, how you would approach a situation in the future.