The test is very difficult, especially for a candidate who has never seen it. There are 50 questions covering three very different types of information, which need to be completed within 15 minutes. Less than 1% of all candidates answer all 50 questions during the test. The difficulty does not stem from the difficulty level of each specific question but from other factors such as the severe time constraints (18 seconds per question), the exposure to unfamiliar question formats, and the need to continuously switch from solving one type of question to another. However, candidates who take practice tests and understand the types of questions they will be working on have a significant advantage. Practices allow you to pace yourself, find your areas of strength, and perform well on the test.