Home / Exams / EPFO / APFC_2025 / Question
EPFO · 2025 Quantitative Aptitude › Number System
Five prime numbers are arranged in ascending order. The ratio of the product of the first three of them to that of the last three of them is 35 : 323. What is the difference between the smallest and the largest numbers ?
🔎 The pattern behind this question
This is the same idea UPSC keeps returning to. Start a free trial to see the answer and the full map.
Across examsEPFO 4
Evolution“Ratio” tested across 2 years (2020–2025)
Related ideasSpeed Time Distance

Study how UPSC repeats — not just the papers

₹199 / 1 year · Founding Member

Full access unlocks the three things no PYQ PDF gives you:
① Cross-exam learning — see the same idea recur across CSE, CAPF, CDS and NDA.
② Topic evolution — how each idea is framed, year by year.
③ Question intelligence — every PYQ + answer, linked to related concepts and similar questions.

e.g. Round Table Conference: CDS 2017 → CSE 2017 → … → CAPF 2024

15 days free, no card required — then ₹199 for 1 year.

Start your 15-day free trial →
💬 Feedback

Send feedback