What is the LCM of 12, 18 and 24?

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• A 82
• B 54
• C 72
• D None

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Answer: C. 72

Write prime factors: 12 = 2^2 x 3, 18 = 2 x 3^2, 24 = 2^3 x 3. The LCM takes the highest power of each prime: 2^3 x 3^2 = 8 x 9 = 72.

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