+8259

+114481

+121056

Here"s a rather odd method of identify this....but the works!!! It"s dubbed the "Sieve of Eratosthenes"

First take it the smaller provided number and also subtract that from the larger......so us have......

You are watching: What is the gcf of 8 and 20

20 - 8 = 12 ........Now, go 12 divide both 8 and also 20??? Nope. Now, compare what we subtracted (12) and the an outcome we obtained (8) and, again, subtract the smaller from the larger.

So we have actually 12 - 8 = 4........Now, walk 4 division 8 and also 12?? Yep. And that"s our GCF...!!!

Why go this work?? because if a number divides two subtracted quantities, it also divides your sum. Therefore 4 divides 8 and also it additionally divides 8 + 12 = 20 !!!

Note, if we usage this process on two numbers and also we end up with a "1," the numbers are relatively prime to each other. That provides sense......only one non-zero number divides two reasonably prime numers....namely, 1 !!

CPhill Aug 26, 2014

#4

+114481

**+5**

finest Answer

okay mine turn

GCF of 8 and also 12

look at the little one 8

factors of 8 space 1,2,4,8

Now look at these determinants -biggest come smallest.

Does 8 go into 12 NO

Does 4 go int 12 correct so 4 is the GCF

Melody Aug 26, 2014

Post new Answer

### 23 virtual Users

### Top Users

+114481 Melodymoderator

+34328 ElectricPavlov

+32555 Alanmoderator

+22158 geno3141

+12217 asinusmoderator

+9308 hectictar

+5263 rarinstraw1195

+4707 MathsGod1

+3114 TitaniumRome

+3108 admin

**administrator**

+2422 Probolobo

### Sticky Topics

What is continue 5

Again a number puzzle. Multiply in writing.

Loads of funny printable number and also logic puzzles

¤¤¤¤Welcome to rememberingsomer.com¤¤¤¤

How to display latex properly

Feature concerns 1 - started 8th may 19

Filter Issues

How come upload a picture.

See more: 2001 Dodge Ram 1500 Speedometer Not Working, Brake + Abs Light On

If a inquiry is ticked the does not mean you cannot proceed it.

Should you consider anything before you prize a question?

Geometry Thread

PUZZLES

LaTex Coding

https://www.desmos.com/calculator/bsh9ex1zxj

Is PROCRASTINATION a trouble for girlfriend ?

Historical post!

What is happening? pave #4

Great inquiries to discover From 2

Great answer to discover From

Reference Material

### About

### Links

### Contact

Withdraw cookie consent

rememberingsomer.com rememberingsomer.com.0rechner.de rememberingsomer.com.es rememberingsomer.com.fr rememberingsomer.com.in rememberingsomer.com.ru