Germany has 16 states with Berlin as a startup city and a population of 81 million. It has the 4th largest economy in the world and the largest in Europe. Some famous cities include Berlin, Munich, Frankfurt, Hamburg, and Dresden. Students are allowed 120 full or 240 half working days per year. After studying, students can apply for an 18-month post-study work permit and citizenship after 5 years including study time. Public universities require a minimum 65% for bachelor's and 75% for master's degrees, along with a minimum GRE score of 310. Private universities have lower eligibility requirements. The TestAS aptitude exam will be mandatory from January 2023 for student visas to Germany.