1 / 11New Delhi: Apart from India, many countries have such exams, which are very difficult to crack. 'The World Ranking' has recently released 10 such exams on its official Twitter account, which are the toughest exams in the world. 2 / 11The Gaokao is a Chinese college entrance exam, ranked among the 10 toughest exams in the world.3 / 11The second toughest exam in the world is India's IIT-JEE, which is the entrance exam for engineering courses at the Indian Institutes of Technology (IIT).4 / 11The toughest and most prestigious exam in India, the Central Public Service Commission's Civil Services Examination (CSE) is ranked third in the list.5 / 11Mensa is one of the oldest organizations in the world, with members having an IQ higher than 98 percent of the population, placing them in the top 2 percent of the world. Must pass Mensa test to join.6 / 11The Graduate Record Exam (GRE) is one of the toughest exams in the world and ranks 5th on this list. This exam is conducted for studying abroad.7 / 11The Chartered Financial Analyst (CFA) exam is considered one of the toughest and most challenging exams in the financial industry. More than one lakh candidates from over 100 countries attempt the CFA every year.8 / 11The Cisco Certified Internetworking Expert (CCIE) exam is one of the toughest exams in finance. It is considered as the 7th toughest exam in the world.9 / 11Graduate Aptitude Test in Engineering (GATE), is a national level online examination for admission to engineering courses. It is also grown in India, Bangladesh, Sri Lanka, Nepal, Ethiopia and United Arab Emirates.10 / 11The United States Medical Licensing Examination (USMLE), is an exam sponsored by the State Medical Board (FSMB) and the National Board of Medical Examiners (NBME).11 / 11The California bar exam consists of the general bar exam and the attorney exam. The general bar exam consists of five essay questions, a multistate bar exam (MBE), and a performance test (PT).