Exams › SSC CGL (Prelims) › Maths

What is the LCM of 12 and 18?

1. 36
2. 24
3. 30
4. 18

Correct answer: 36

Solution

The prime factors are 12 = $2^2 \times 3$ and 18 = $2 \times 3^2$. Taking the highest powers of each prime gives LCM = $2^2 \times 3^2 = 36$.

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