Consulting firm interviewees are almost always required to solve a case. In a case interview, the interviewer presents an applicant with a business problem that he or she must solve. Often, case interviews involve data tables and charts. To successfully complete a case, interviewees must be able to think creatively, use mental math, and articulate their thoughts well. Consulting cases are intimidating at first, but become much easier with practice. The following materials are a good place to start familiarizing yourself with cases.