2025 CSAT, all questions
UPSC Prelims 2025 · CSAT
Question 10: Basic Numeracy
The price (p) of a commodity is first increased by k%; then decreased by k%; again increased by k%; and again decreased by k%. If the new price is q, then what is the relation between p and q ?
ap(10^4 – k^2)^2 = q × 10^8
bp(10^4 – k^2)^2 = q × 10^4
cp(10^4 – k^2) = q × 10^4
dp(10^4 – k^2) = q × 10^8
UPSC's 2025 key was reported published in May 2026, but no file was found on upsc.gov.in or in the Wayback Machine. The 2025 papers can be browsed, not scored.
Source: UPSC, Civil Services (Preliminary) Examination 2025, General Studies Paper II (CSAT), Series A. The paper on upsc.gov.in.