Examples
Example 1: Find the LCM of 4 and 16.
Solution:
Prime factorization of 4: 4 = 2, 2
Prime factorization of 16: 16 = 2, 2, 2, 2
Take the highest power of each prime factor and multiply them together to get LCM.
Therefore, LCM(4, 16) = 16.
Example 2: Find the LCM of 10 and 15.
Solution:
Prime factorization of 10: 10 = 2, 5
Prime factorization of 15: 15 = 3, 5
Take the highest power of each prime factor and multiply them together to get LCM.
Therefore, LCM(10, 15) = 30.
Example 3: Find the LCM of 8 and 12.
Solution:
Prime factorization of 8: 8 = 2, 2, 2
Prime factorization of 12: 12 = 2, 2, 3
Take the highest power of each prime factor and multiply them together to get LCM.
Therefore, LCM(8, 12) = 24.
Exercise
1. LCM(20,30,40) = 120
2. LCM(14,21) = 42
3. LCM(24,32) = 96
4. LCM(9,15,18,21) = 630
5. LCM(16,24,32) = 96
6. LCM(5,10,15) = 30
7. LCM(12,18,24) = 72
8. LCM(15,25,35) = 525
9. LCM(16,32,48) = 96
10. LCM(21,28,35,42 ) = 420