Understanding what LCM means in a Word Problem

This post has been de-listed

It is no longer included in search results and normal feeds (front page, hot posts, subreddit posts, etc). It remains visible only via the author's post history.

Post Body

Hello everyone. I was doing the following question:

https://preview.redd.it/oggau2wepgc31.png?width=589&format=png&auto=webp&s=af3a5a7fa71dfd40dfe517b5a9db36177655acf0

And one of the ETS explanations reads:

Alternatively, you may realize that if the lights flash together, the number of seconds that will elapse before they flash together the next time is the least common multiple of 6 and 10. To find the least common multiple of 6 and 10, begin by writing each integer as the product of its prime factors.

I'm having problem understanding what the LCM represents in "real life" problems. Could someone provide some light into it?

Author

Account Strength

90%

Account Age

5 years

Verified Email

Yes

Verified Flair

Total Karma

1,876

Link Karma

181

Comment Karma

1,662

Profile updated: 1 day ago

Posts updated: 1 day ago

throwawayacc2K19

Preparing for GRE

Subreddit

r/GRE

Post Details

We try to extract some basic information from the post title. This is not always successful or accurate, please use your best judgement and compare these values to the post title and body for confirmation.

Posted: 5 years ago
Reddit URL: View post on reddit.com
External URL: reddit.com/r/GRE/comment...