Join Anantam IAS Channel on Telegram

TOPIC

Quadratic Equations

1 UPSC Prelims MCQs tagged "Quadratic Equations". Free practice with answer keys, explanations, and timed mock tests on Anantam IAS.

Agriculture and Allied Activities 56 Money, Banking and Monetary Policy 43 Environmental Pollution 43 Biotechnology 37 Parliament 33 Climate Change 32 Finance and Financial Markets 29 Emerging Technologies 28 Trade and External Sector 26 Life Sciences 26 Core Concepts and Foundational Science 20 Public Finance in India 19 International Environmental Framework 18 Continents 18 Religions in India 18 Fundamental Rights 18 Concept and Salient Features of the Constitution 17 Indian Biodiversity - Fauna 17 Renewable Energy 16 Major Physical Divisions of India 16 Multilateral Groupings 16 International Institutions 15 Art and Architecture 15 Drainage System 15 Institutional Measures for Environment Conservation 14 Regional Groupings 14 Rivers and Drainage 14 Infrastructure and Investment Models in India 14 Atmosphere 13 Space Technology 13

Find a positive number which, when multiplied by 2 and decreased by 10, is…
Find a positive number which, when multiplied by 2 and decreased by 10, is equal to 12 times the reciprocal of the number.
1. A2
2. B4
3. C6
4. D8
Answer and explanation
Correct answer: C
The condition gives 2x - 10 = 12/x, which becomes 2x^2 - 10x - 12 = 0, or x^2 - 5x - 6 = 0. Factoring as (x - 6)(x + 1) = 0 gives x = 6 or x = -1, and the positive value is 6.
Open this question on its own page
CSAT UPSC GPSC-2026 Medium