Exams › SSC CGL (Prelims) › Maths

Find the LCM of 12, 15 and 20.

1. 60
2. 120
3. 180
4. 240

Correct answer: 60

Solution

The prime factors are 12 = $2^2 \times 3$, 15 = $3 \times 5$, and 20 = $2^2 \times 5$. Taking the highest powers gives $2^2 \times 3 \times 5 = 60$.

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