Hello, you have two tests with McKinsey. The first is a quantitative with 18 questions. These are similar to the more challeging GMAT questions with several calculations needed and data presented in tabular or graphical format (also similar to some SHL test questions). Overall similarity with GMAT though not great (no data sufficiency etc). The second test comprises of 3 case studies with a total of 35 questions. Some of these questions are multiple choice and you may be required to give multiple answers (eg ranking the relevance of answers to question, or least important and most important, or the two-three most important etc). These questions require business awareness, verbal reasoning skills and may have some number manipulation. There is an awful lot of information presented that is difficult to assimulate and understanding of the issues builds on both the information presented in the texts and in the previous questions. Idea is that the questions walk you through the case study, from initial analysis to recommending actions. Lots of retail banking and medical insurance.