On campus interview (MBA), with two rounds back to back. The interviews were both case studies, giving an initial brief of the problem verbally, laying out the situation with limited information, where you are expected to come up with relevant questions to prompt them to provide additional data in printed form. Typically, the cases were single issue problems (cost saving, expansion) and where you are judged on how you structure the problem. This directly affects the questions you ask and the information you get (eg. competitor's costs). A part of solving the case would require you to make some calculations (eg. contribution margins for different products) which are fairly straightforward. Good overall experience, with the interviewers maintaining a friendly and open approach.