Intelligence Tests carry a lot of importance. You will face these in many exams of your life. A junior class student may perform better than a senior class if he has practiced well. At selection centre the test will be on computer and at ISSB on paper. Number of Questions and time in each test is very important which is for Verbal Intelligence Tests About 105 mix verbal questions in 30 minutes. Non Verbal Intelligence Tests: About 70 questions in 30 minutes and Mechanical Aptitude Test About 50 questions in 15 minutes.