10 hardest exams in the world

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1. Gaokao – China’s National College Entrance Exam
   Gaokao is considered one of the most stressful and competitive exams in the world. Every year, millions of Chinese students sit for this national university entrance examination, which largely determines their academic and professional future. The exam usually takes place over two or three days and lasts around nine hours in total. Students are tested in subjects such as Chinese literature, mathematics, foreign languages, and either science or humanities.

What makes Gaokao especially difficult is the enormous societal pressure attached to it. In China, admission to elite universities is seen as a pathway to financial security and social mobility. Many students begin preparing from a very young age, spending years attending extra tutoring classes and following intense study schedules. Families often invest heavily in their children’s education, while students sacrifice sleep, hobbies, and social life. Because university placements are highly competitive, even a small difference in scores can change a student’s future dramatically.

2. UPSC Civil Services Examination – India
   The UPSC Civil Services Examination is one of the most prestigious and difficult competitive exams in India. Conducted by the Union Public Service Commission, it selects candidates for top government positions such as the Indian Administrative Service (IAS), Indian Police Service (IPS), and Indian Foreign Service (IFS).

The exam consists of three stages: the Preliminary Exam, the Main Examination, and the Personality Test. The preliminary stage includes objective questions on general studies and aptitude. Candidates who pass move on to the written Main Exam, which contains nine papers covering subjects like history, geography, economics, politics, ethics, and optional specialization subjects. The final stage is a personal interview that assesses leadership, communication skills, confidence, and decision-making abilities.

The syllabus is extremely broad, requiring candidates to stay informed about current affairs while also mastering academic subjects. Preparation often takes years, and many aspirants dedicate their entire daily routine to studying. Despite millions applying every year, only a very small percentage secure top government posts, making UPSC one of the most selective exams globally.

3. Bar Exam – United States
   The Bar Exam is required for law graduates who want to practice as licensed attorneys in the United States. Each state has its own version of the exam, but most include three main components: the Multistate Bar Examination (MBE), the Multistate Essay Examination (MEE), and the Multistate Performance Test (MPT).

The MBE consists of multiple-choice questions covering constitutional law, criminal law, contracts, evidence, and other core legal subjects. The MEE evaluates candidates’ ability to analyze legal problems through written essays, while the MPT tests practical legal skills using realistic case scenarios. The exam typically lasts two or three days and requires both legal knowledge and strong analytical thinking.

Preparation for the Bar Exam is intense. Candidates spend months memorizing laws, reviewing case studies, and practicing essays under timed conditions. In states like California, known for particularly difficult standards, pass rates are often below 50%. The pressure is especially high because passing the exam is essential for beginning a legal career.

4. All Souls Prize Fellowship Exam – Oxford University
   The All Souls Prize Fellowship Exam at Oxford University is often described as one of the world’s most intellectually demanding exams. Unlike traditional university entrance exams, this test is designed to select a small number of exceptional scholars for a prestigious fellowship at All Souls College.

Candidates are required to complete four extensive written papers. Two papers are based on their chosen academic discipline, while the remaining papers focus on general essays. Some essay prompts are famously abstract, consisting of a single word or phrase such as “freedom,” “chaos,” or “truth.” Applicants must produce highly original, deeply analytical responses supported by evidence and critical thinking.

What makes this exam unique is that it values creativity and intellectual originality more than memorization. The success rate is below 1%, and even brilliant students from Oxford struggle to pass. Winning the fellowship is considered one of academia’s highest achievements.

5. CFA (Chartered Financial Analyst) Exam
   The CFA qualification is regarded as one of the toughest certifications in the finance and investment industry. Managed by the CFA Institute, the program consists of three levels, each focusing on different aspects of financial analysis, portfolio management, ethics, and investment strategies.

Level I tests foundational financial concepts and quantitative methods. Level II focuses on advanced valuation techniques and financial analysis, while Level III emphasizes portfolio management and practical investment decision-making. Each level requires candidates to study hundreds of hours, often while balancing full-time jobs.

One of the main reasons the CFA is so challenging is the sheer amount of material candidates must master. Ethics plays a major role throughout all three levels, and questions are designed to test practical understanding rather than simple memorization. Pass rates for each level are usually below 50%, and completing the entire qualification can take several years.

6. Master Sommelier Diploma Exam
   The Master Sommelier Diploma Exam is one of the most difficult professional exams in the hospitality and wine industry. Administered by the Court of Master Sommeliers, the exam tests candidates in theory, service, and blind tasting.

In the theory section, candidates must demonstrate extensive knowledge of wine regions, grape varieties, production methods, spirits, cigars, and global hospitality standards. The service section assesses practical restaurant skills, including wine pairing recommendations, bottle presentation, and handling demanding customer situations.

The most difficult part is often considered the blind tasting section. Candidates are required to identify wines purely through smell and taste, determining their origin, grape type, vintage, and production style with remarkable accuracy. Years of training and tasting experience are necessary to succeed. Because of its extremely low pass rate, becoming a Master Sommelier is considered one of the highest honors in the culinary and hospitality world.

7. Medical Licensing Exams (USMLE and PLAB)
   Medical licensing exams are among the toughest assessments faced by future doctors. In the United States, the USMLE (United States Medical Licensing Examination) is a three-step process evaluating medical knowledge, patient care, and clinical decision-making. In the United Kingdom, international doctors must pass the PLAB exam to practice medicine.

USMLE Step 1 focuses on foundational sciences such as anatomy, pathology, and pharmacology. Step 2 assesses clinical knowledge and patient interaction skills, while Step 3 evaluates a doctor’s ability to manage real-world medical situations independently. The PLAB exam similarly combines theoretical questions with practical clinical examinations.

These exams are difficult because medicine requires both academic excellence and practical judgment. Candidates spend years studying complex scientific concepts while also gaining clinical experience in hospitals. Long study hours, emotional pressure, and the responsibility associated with patient care make these exams particularly demanding.

8. Engineering Exams (GATE and FE/PE)
   Engineering students and professionals face major challenges through exams such as India’s GATE and the FE and PE exams in the United States. These tests assess technical knowledge, engineering principles, and advanced problem-solving abilities.

GATE, or the Graduate Aptitude Test in Engineering, is primarily used for postgraduate admissions and recruitment in India’s public sector companies. It covers core engineering subjects alongside mathematics and analytical reasoning. Because of the vast syllabus and intense competition, candidates often spend years preparing.

In the United States, aspiring professional engineers first take the Fundamentals of Engineering (FE) exam. After gaining practical work experience, they may sit for the Professional Engineer (PE) exam, which evaluates advanced engineering knowledge and professional competency. Passing these exams is crucial for obtaining engineering licenses and career advancement.

9. Mensa Admission Test
   The Mensa Admission Test is designed to measure intelligence and logical reasoning rather than academic knowledge. Mensa is an international high-IQ society open only to individuals who score within the top 2% of the population on approved intelligence tests.

The exam includes puzzles, pattern recognition, logical sequences, and analytical reasoning tasks. Unlike academic exams, candidates cannot rely on memorization or textbook preparation. Instead, success depends on problem-solving speed, abstract thinking, and mental agility.

Although the test is shorter than many professional exams, the pressure is intense because questions are designed to challenge even highly intelligent individuals. Achieving a Mensa-level score is considered a symbol of exceptional intellectual ability worldwide.

10. International Mathematical Olympiad (IMO)
    The International Mathematical Olympiad is one of the most prestigious and difficult mathematics competitions in the world. Open to pre-university students, the IMO gathers the brightest young mathematicians from different countries to solve highly advanced mathematical problems.

The competition consists of six problems divided across two days. Questions focus on algebra, geometry, number theory, and combinatorics. Unlike standard school exams, IMO problems require creative thinking, deep logical reasoning, and elegant proofs rather than straightforward calculations.

Preparing for the IMO often involves years of mentorship, advanced mathematical training, and participation in national-level competitions. Even professional mathematicians sometimes find the problems difficult to solve. Winning a medal at the IMO is considered one of the highest achievements for young mathematics students and often opens doors to leading universities and research careers.

Source: Educatly