Question

What is the LCM of 6 and 9?

Answer 1

`LCM(6,9)=18`

Explanation:

The LCM is the least common multiple that two or more numbers have in common.

Write out the multiples and pick the common ones out.

multiples`" "6:{6,12,color(red)(18),24,30,color(red)(36),42,48,color(red)(54),60,66,..}`

multiples`" "9:{9,color(red)(18),27,color(red)(36),45,color(red)(54),...}`

common multiples`" "{18, 36,54,...}`

`LCM(6,9)=18`