How can you tell when the least common multiple of two numbers will equal one of the numbers or equal the product of the numbers

Question

I am having problems understanding what this question means and I need help understanding it better because I do not want to get an F on math

Answer 1

The LCM of two numbers will equal one of the numbers if the other number is 1.

 

For example, 43 and 1 have the LCM of 43. Any number times 1 is that number.

 

 

One of the ways to tell if the LCM is the product of the two numbers is if the two numbers are consecutive, for example 6 and 7.  If you line up the first few multiples of each, you won't hit a common multiple until 42, which is the product of 6 x 7.