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Lesson 4: Least Common Multiple (LCM) and Applications — Practice Questions

  1. 1. What is the least common multiple (LCM) of $8$ and $12$? The LCM is ___.

  2. 2. Find the least common multiple (LCM) of $24$ and $30$ using the prime factors method. The LCM is ___.

  3. 3. Find the least common multiple (LCM) of $28$ and $40$ using the prime factors method. The LCM is ___.

  4. 4. Find the least common multiple (LCM) of $8$ and $12$ using the prime factors method. The LCM is ___.

  5. 5. Find the least common multiple (LCM) of $12$ and $16$ using the prime factors method. The LCM is ___.

  6. 6. Find the least common multiple (LCM) of $30$ and $40$. The LCM is ___.

  7. 7. Find the least common multiple (LCM) of $4$ and $3$.

    • A. 1
    • B. 7
    • C. 12
    • D. 24

  8. 8. Find the least common multiple (LCM) of $20$ and $30$. The LCM is ___.

  9. 9. Find the least common multiple (LCM) of $60$ and $75$. The LCM is ___.

  10. 10. Find the least common multiple (LCM) of $12$ and $16$. The LCM is ___.