Short answer

IGCSE difficulty varies by student. There is no single hardest subject. Most students find Mathematics (Extended), Additional Mathematics, and separate sciences (Biology, Chemistry, Physics) the most challenging.

Subjects commonly described as harder

• Additional Mathematics: More advanced than Core Maths; often seen as harder
• Mathematics (Extended): More demanding than Core Maths
• Separate sciences: Biology, Chemistry, Physics as separate subjects need more depth and exam technique
• English Literature: Requires strong essay and analysis skills

What makes them harder

• Additional content: More syllabus and depth
• Skills: Problem-solving, application, essay writing
• Exam style: Longer questions and extended writing

Practical takeaway

Choose subjects that suit your strengths and interests. With good teaching and revision, even “harder” subjects can be manageable. See our top 10 tested topics for revision focus.

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