Which ones that make the list of hardest college subjects?

Hey, upcoming senior here! I'm thinking about potential majors and I'm curious - what are typically the most challenging subjects in college? I'm not talking about workload, but concentration and complexity. Thoughts?

In college, the difficulty of a subject is greatly influenced by your personal strengths, interests, and previous background in the subject. However, consistently cited as highly challenging due to their complexity and depth are:

1. Physics: This subject often requires strong mathematics skills, an ability to grasp abstract concepts, and a knack for problem-solving.

2. Chemistry: While introductory chemistry might be manageable, upper-level chemistry courses such as Physical Chemistry or Organic Chemistry can be quite difficult, involving heavy math and conceptual understanding.

3. Engineering: The field of engineering, be it Mechanical, Chemical, Electrical, etc., often requires a solid grasp of physics and math, practical understanding, and problem-solving capabilities which can be hard to grasp sometimes.

4. Mathematics: Advanced mathematics such as Calculus III, Differential Equations, or Abstract Algebra are notoriously complex and require abstract reasoning and logical thinking.

5. Computer Science: While entry-level courses can be more straightforward, upper-level courses in areas like algorithms, machine learning, or computer vision can be quite challenging, requiring strong math skills and logical thinking.

6. Engineering: The field of engineering, be it Mechanical, Chemical, Electrical, etc., often requires a solid grasp of physics and math, practical understanding, and problem-solving capabilities which can be hard to grasp sometimes.

7. Biomedical sciences: Subjects like Anatomy, Immunology, and Neurobiology can be challenging given the extensive amount of memorization and understanding of complex biological processes they require.

Bear in mind, what might be difficult for one person might be easy for another, so this is not a universal ranking. The key is knowing where your strengths lie and choosing a subject that plays to them. If you're passionate about what you're studying, you'll be more motivated to grasp the concepts, unafraid of any perceived difficulty.