What is the LCM of 10, 15 and 20?
2011
What is the LCM of 10, 15 and 20?
- A.
60
- B.
40
- C.
30
- D.
20
Attempted by 133 students.
Show answer & explanation
Correct answer: A
To find the LCM of 10, 15, and 20, we first determine the prime factorization of each number.
10 = 2 × 5, 15 = 3 × 5, and 20 = 2² × 5.
The LCM is the product of the highest power of each prime factor: 2² × 3 × 5 = 60.