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What is the LCM of 15 and 20?

Mathematics

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Question 1.1

  1. Find the multiples of 15.

    Multiples of 15: 15, 30, 45, 60, 75, ...

  2. Find the multiples of 20.

    Multiples of 20: 20, 40, 60, 80, ...

  3. Identify the least common multiple (LCM).

    The smallest number that appears in both lists is 60.

    The student's answer is A (60).
    ✅ Correct. The LCM of 15 and 20 is 60\boxed{60}.

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