Compulsory · GK-I · 100 marks
Half general science across physics, chemistry, biology and environmental science, half quantitative and logical reasoning. The reasoning half is where repeat question patterns are most visible.
23 papers, 2000 to 2024
General Science and Ability is a wide syllabus with a narrow set of recurring questions. The science half spreads across everything from nanomaterials to wildfires, but the ability half runs on a small number of question types that reappear with new numbers.
FPSC lists this paper as General Knowledge Paper-I (General Science & Ability).
CSS 2025 mean score
32.1/100
That is the average mark real candidates scored on this paper in CSS 2025, against a 40 percent pass requirement. Our full analysis breaks down the score spread, pass rates and provincial split for all six compulsory papers.
Read the CSS 2025 compulsory results analysisSeparate the two halves. Treat the ability questions as a problem bank: number series, distance and shadow problems, area and cost calculations, and network or GPS questions turn up again and again with the values changed.
For the science half, track which topics recur rather than reading a textbook end to end. Environmental questions in particular have grown year on year.
Attempt the MCQ part under its own 30-minute clock. It is a separate answer book and candidates routinely overrun it.
Compulsory papers are fixed at 600 marks for every candidate. Your optional subjects are the 600 you choose, and they decide your aggregate. Our assessment matches them to your degree and coursework using FPSC result data.
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