Question

What is the Least common multiple of 8, 12, 5?

Answer 1

The answer is 120.

Explanation:

Find the multiples of the last number in the problem - 5.
`5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, color(red)(120)...`

Find the multiples of 12 after that:
`12, 24, 36, 48, 60, 72, 84, 96, 108, color(red)(120), 132, 144, 156...`

Finally, find the multiples of 8.
`8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, color(red)(120)...`

So the LCM of 8, 12 and 5 is `color(red)(120).`