UPSC ISS
Part 21: Simpson’s 3/8 Rule and Weddle’s Rule for UPSC ISS: Multiples of 3 and 6
August 30, 2026
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UPSC ISSUpdates & News
UPSC ISS Result 2026 Declared: 94 Qualify for the Interview
August 5, 2026
The UPSC ISS Result 2026 for the written examination was declared on 4 August 2026. Across the entire country, 94…
UPSC ISS Result 2026 Declared: 94 Qualify for the Interview
August 5, 2026
UPSC ISS 2026 Notification: Dates, Vacancies, and Important Rules
February 12, 2026
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Part 21: Simpson’s 3/8 Rule and Weddle’s Rule for UPSC ISS: Multiples of 3 and 6
Shyam Agrawal
August 30, 2026
Welcome back to Part 21 of Module 5, updated for the UPSC ISS 2026 to 2027 cycle. Simpson’s 1/3 Rule…
Part 20: Simpson’s 1/3 Rule for UPSC ISS: The Degree 3 Exactness Trick
Shyam Agrawal
August 29, 2026
Welcome back to Part 20 of Module 5, the single most important part of this module, updated for the UPSC…
Part 19: Trapezoidal Rule for UPSC ISS: Formula, Error Bound, and the Degree 1 Exactness
Shyam Agrawal
August 28, 2026
Welcome back to Part 19 of Module 5, updated for the UPSC ISS 2026 to 2027 cycle. In Part 18…
25 Technical Questions From Real ISS Interviews, Rapid Fire
Shyam Agrawal
August 27, 2026
Every question below was asked in a real UPSC ISS interview, drawn from the transcripts of recommended candidates across the…
Part 18: General Quadrature Formula for UPSC ISS: The Mother of All Integration Rules
Shyam Agrawal
August 27, 2026
Welcome back to Part 18 of Module 5, updated for the UPSC ISS 2026 to 2027 cycle. Part 17 taught…
Current Affairs for the ISS Interview: Census 2027, DPDP and AI
Shyam Agrawal
August 26, 2026
Three stories dominate India’s data landscape as the 2026 interviews approach: Census 2027 is underway with its houselisting phase running…
Part 17: Numerical Differentiation for UPSC ISS: Calculus Without Calculators
Shyam Agrawal
August 26, 2026
Welcome to Part 17 and the opening of Module 5, updated for the UPSC ISS 2026 to 2027 cycle. With…
P Value in Simple Words: The Explain It Simply Round of ISS Interviews
Shyam Agrawal
August 25, 2026
ISS boards regularly ask candidates to explain statistical ideas in plain language: a p value to a layman, the difference…
How Is GDP Calculated in India? The New 2022-23 Series Explained
Shyam Agrawal
August 24, 2026
India’s GDP is estimated by the National Statistical Office by measuring the value added of every sector of the economy,…
CPI, WPI and IIP: The Index Questions ISS Boards Ask in 2026
Shyam Agrawal
August 23, 2026
India measures prices and production through three headline indices: the Consumer Price Index for retail prices, the Wholesale Price Index…
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UPSC ISS 2026 Question Papers PDF Download with Answer Key
The UPSC Indian Statistical Service papers for 2026 were held from 19 to 21 June 2026. With the exam now…