The document is a series of 50 problems that ask the reader to identify the odd one out in sets of 5 numbers or words. It presents the problems in sets of 10 across 5 pages, with the numbers 1 through 50 representing each problem. After every 10 problems it prompts the reader to provide the answers. The purpose is to test the ability to differentiate items that are different from the others in otherwise similar groupings.