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- In order to do a factor you need to draw 3 lines vertical and 3 horizontal.
- Then you write the numbers on the lower left squares.
- Then on the far left side you put a number that goes into both numbers.
- You keep on going until the numbers are simplified the most.
- The top first numbers are the smallest fractions you can get. The to find the least common multiple you multiply all the left numbers and all the numbers on top.
- To find the greateset common factor you multiply all the numbers on the left side.
- If you need help email me at : reyes70@q.com

Q: How do you a factor ladder?

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There's no practical difference, it's just how you arrange the numbers.

Don't bother. Since 25 is a factor of 75, it is automatically the GCF.

2 |10,18 , |_________ 5,9 The GCF is 2.

155,3105,2The GCF is 5.The GCF of 10 and 15 is 5.

It would only have one rung, since the only common prime factor of 22 and 60 is 2. 2)22,60

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There's no practical difference, it's just how you arrange the numbers.

you have to use a factor tree

No.

60 30,2 15,2,2 5,3,2,2

The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself. So you do not need to use the division ladder or any other method!

320 160,2 80,2,2 40,2,2,2 20,2,2,2,2 10,2,2,2,2,2 5,2,2,2,2,2,2

either list factors, do factor trees, or division ladder

800 400,2 200,2,2 100,2,2,2 50,2,2,2,2 25,2,2,2,2,2 5,5,2,2,2,2,2

Don't bother. Since 25 is a factor of 75, it is automatically the GCF.

The GCF is 3.

Don't bother. Since 25 is a factor of 75, it is automatically the GCF.

Out of four total factors, 85 has two prime factors: 5 and 17.