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Mathematics 21 Online
OpenStudy (bj11684):

The LCM of 4 and 7 is ____.

OpenStudy (anonymous):

What do you think it is?

OpenStudy (bj11684):

idk

OpenStudy (anonymous):

The LCM (least common multiple) of two or more non-zero whole numbers is the smallest whole number that is divisible by each of those numbers. In other words, the LCM is the smallest number that all of the numbers divide into evenly.

OpenStudy (bj11684):

for 4 it is 2

OpenStudy (bj11684):

right

OpenStudy (anonymous):

No

OpenStudy (anonymous):

Did you read what I wrote?

OpenStudy (bj11684):

oh

OpenStudy (anonymous):

You are thinking of greatest common factor. but here we are looking for the LCF

OpenStudy (anonymous):

**LCM

OpenStudy (bj11684):

oh ok

OpenStudy (anonymous):

4 x 7 = ?

OpenStudy (bj11684):

28

OpenStudy (anonymous):

Yep :)

OpenStudy (anonymous):

That's your answer. Do you understand why thats the LCM?

OpenStudy (bj11684):

yes

OpenStudy (anonymous):

Okay good. If you need any help just message me :)

OpenStudy (bj11684):

ok

zepdrix (zepdrix):

LCM of 4 and 7 means: Take a bunch of 4's and a bunch of 7's And see when they match up. 4, 8, 12, 16, 20, 24, 28, 32 7, 14, 21, 28, 35, 42 28 is the first time they match! ^^ Just another way to think about it :))

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