Solved UPSC CDS/OTA Question
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Q · LCM and HCFModerate · 45s
The HCF of 24 and 36 is:
TopicLCM and HCF
Question Typemultiple choice
DifficultyModerate
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
The factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24.
The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36.
The common factors are 1, 2, 3, 4, 6, and 12.
The highest common factor (HCF) is 12.
Final Answer: Option C — 12