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March 4, 2015

March 4, 2015

Posted by **Celia** on Saturday, October 24, 2009 at 7:35pm.

- math115 -
**Ms. Sue**, Saturday, October 24, 2009 at 8:09pmThere's always a common multiple. One way to do this is to find the multiples of the largest number and find the smallest number that the others will go into.

44, 88, 132, 176, 220, and so on

If that doesn't work, multiply 24 * 15 * 44.

- math115 -
**celia**, Saturday, October 24, 2009 at 8:36pmso would it be 360

- math115 -
**jim**, Saturday, October 24, 2009 at 9:10pm15 ad 24 go into 360 evenly. Does 44?

- math115 -
**celia**, Saturday, October 24, 2009 at 9:20pmno would it then be 15840

- math115 -
**jim**, Saturday, October 24, 2009 at 9:23pmYou can also do it by getting the prime factors of each:

15 -> 3, 5

24 -> 2, 2, 2, 3

44 -> 2, 2, 11

Now, your LCM must contain all the numbers from any one of those lines.

Start by selecting any line, say 15:

3, 5

Now add anything else yu need from 24:

2, 2, 2, 3, but we don't need the 3, because we have one, so now we're at:

3, 5, 2, 2, 2

44 -> 2, 2, 11, but we already have two 2s in our list, so all we have to add is the 11:

3, 5, 2, 2, 2, 11

We usually rewrite this low to high, like

2, 2, 2, 3, 5, 11

So multiplying those will give your your LCM.

- math115 -
**celia**, Saturday, October 24, 2009 at 9:32pm1320

- math115 -
**jim**, Saturday, October 24, 2009 at 9:39pmYes!

- math115 -
**celia**, Saturday, October 24, 2009 at 9:41pmThank you!!!!!!!!!! ur awesome

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