Studying math effectively requires a combination of understanding concepts, practicing problem-solving, and developing a solid foundation. Here are some tips to help you study math more efficiently:

1. Understand the Fundamentals:

   • Ensure you have a strong grasp of basic concepts before moving on to more advanced topics.
   • Review previous material regularly to reinforce your understanding.

2. Active Learning:

   • Engage actively with the material. Don't just passively read through the text or notes.
   • Take notes, ask questions, and try to explain concepts to yourself or others.

3. Practice Regularly:

   • Mathematics is a skill that improves with practice. Solve a variety of problems to reinforce your understanding.
   • Work on both conceptual problems and those that involve calculations.

4. Work on Problem-Solving Techniques:

   • Understand the problem-solving techniques applicable to different types of math problems.
   • Break down problems into smaller, manageable parts.

5. Use Resources Wisely:

   • Utilize textbooks, online resources, and videos to gain different perspectives on topics.
   • Seek help from teachers, tutors, or online forums when you encounter difficulties.

6. Create a Study Schedule:

   • Allocate specific time slots for math study in your schedule.
   • Regular, consistent practice is often more effective than cramming.

7. Review and Reflect:

   • Periodically review your notes and previous assignments.
   • Reflect on your mistakes and understand why you made them to avoid similar errors in the future.

8. Teach Others:

   • Teaching a concept to someone else can deepen your understanding.
   • Join study groups or find a study partner to discuss and solve problems together.

9. Use Technology:

   • Utilize math software, online tools, and calculators to enhance your learning experience.
   • Explore interactive resources that make learning more engaging.

10. Stay Positive:

    • A positive mindset can significantly impact your ability to learn and succeed in math.
    • Don't get discouraged by challenges; instead, view them as opportunities to learn and improve.

11. Seek Real-World Applications:

    • Connect mathematical concepts to real-life situations. This can make the material more interesting and practical.

12. Take Breaks:

    • Breaks are crucial for maintaining focus. Short, regular breaks can help prevent burnout and improve overall productivity.

Remember, everyone learns differently, so tailor these tips to suit your learning style. Consistency and perseverance are key when studying math.

Determining the "hardest" type of math is subjective and depends on individual strengths, interests, and background. However, some branches of mathematics are often considered more advanced and challenging due to their abstract nature and complexity. These include:

1. Advanced Calculus and Analysis: Topics like real analysis and complex analysis can be quite challenging, delving into rigorous proofs and abstract concepts.

2. Abstract Algebra: This branch involves studying algebraic structures, such as groups, rings, and fields, and can be highly abstract and theoretical.

3. Topology: Topology explores properties of space that remain unchanged under continuous deformations, and it can involve intricate concepts and advanced mathematical reasoning.

4. Differential Geometry: This area of mathematics connects calculus and geometry, dealing with smooth surfaces and curves in higher-dimensional spaces.

5. Functional Analysis: This branch extends ideas from linear algebra and calculus to infinite-dimensional spaces, introducing abstract concepts and complex mathematical structures.

6. Number Theory: Focusing on the properties of integers and number patterns, number theory involves deep mathematical reasoning and has connections to cryptography and computer science.

7. Mathematical Logic: This area deals with the foundations of mathematics and the study of formal systems. It can involve complex symbolic manipulation and logical reasoning.

Keep in mind that what one person finds challenging, another might find more accessible based on their background and interests. Additionally, the perceived difficulty of a mathematical topic can vary based on how it is taught and the resources available.

The International Mathematical Olympiad (IMO) is a prestigious and challenging competition for high school students. The problems posed in the IMO require a deep understanding of various mathematical concepts and the ability to apply them creatively. The level of math required to solve IMO problems is typically advanced and covers a wide range of topics.

Participants are expected to have a solid foundation in algebra, geometry, number theory, combinatorics, and other advanced mathematical subjects. However, it's not just about knowing the formulas and theorems but also about being able to think critically, solve complex problems, and present clear and rigorous solutions.

The difficulty of IMO problems often surpasses the standard high school curriculum, and participants may need to explore more advanced topics on their own. Successful IMO participants usually have a strong passion for mathematics, extensive problem-solving experience, and a deep understanding of mathematical principles. They are often well-versed in proof-writing and can tackle problems that require creative and original thinking.