Q: Which one of the following is the correct sequence in respect of the Roman numerals—C, D, L and M?
(a)C > D > L > M
(b)M > L > D > C
(c)M > D > C > L
(d)L > C > D > M
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Number systems / Roman numerals — UPSC Prelims Previous Year Questions
1 questions from UPSC CSE Prelims GS Paper 1 on Number systems / Roman numerals (Science & Technology). Spanning from 2008 to 2008. Practice with show/hide answers and detailed explanations.
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What UPSC Asks About Number systems / Roman numerals
Number Systems and Roman Numerals cropped up in a single 2008 question, yet they remain evergreen quick-score areas linked to mental ability. UPSC can test conversions among Roman, Hindu-Arabic, binary, octal and hexadecimal formats; recognition of invalid Roman formations; positional versus non-positional notation; and the historical evolution of zero. With Digital India pushing coding literacy, expect trivial-but-tricky items on ASCII codes, Unicode points or binary arithmetic under science & tech. Memorising Roman numeral subtraction rules (IV, IX, XL, XC, CD, CM), place-value weights (2ⁿ) and shortcut divisibility tricks enables rapid elimination. Mock drills on date notation, copyright year deciphering and clock-face usage will round off coverage.
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Frequently Asked Questions
What is the largest number that can be written in standard Roman numerals without using a bar?▼
3,999, written as MMMCMXCIX; higher numbers traditionally require an overline to indicate multiplication by 1,000.
How many 1s are present in the binary representation of 255?▼
255 equals 11111111 (base 2), so there are eight 1s— a common parity-counting trick UPSC may use.