Catastrophe definition, a sudden and widespread disaster: the catastrophe of war. See more.
1 Total Time: The computer-delivered GRE takes 3 hours and 45 minutes for the average student.  Experts recommend sitting for the GRE exam one year prior to entering graduate school. This allows for ample study time and the option to retake it if desired.
During week 4, you will finish your preparation for the GRE. You'll review the second of your simulation exams, and, more importantly, you'll do more practice questions and then REVIEW all of the practice questions that you have seen. You'll need to spend at least 6 days in preparing for the GRE, spending upwards of 2 hours each day, for a total of 12 hours. Here is a sample week plan: Day 1: Review the second simulation GRE exam that you took at the end of week #3.