Railway Recruitment Board Mathematics — Question 652
Question
Find the LCM of 12, 15, and 20.
- 40
- 60
- 80
- 120
Correct answer
B — 60
Explanation (English)
Prime factors: 12=2²×3, 15=3×5, 20=2²×5. LCM = 2²×3×5 = 60
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