GCF of 85 and 100


The gcf of 85 and 100 is the largest positive integer that divides the numbers 85 and 100 without a remainder. Spelled out, it is the greatest common factor of 85 and 100. Here you can find the gcf of 85 and 100, along with a total of three methods for computing it. In addition, we have a calculator you should check out. Not only can it determine the gcf of 85 and 100, but also that of three or more integers including eighty-five and hundred for example. Keep reading to learn everything about the gcf (85,100) and the terms related to it.

What is the GCF of 85 and 100

If you just want to know what is the greatest common factor of 85 and 100, it is 5. Usually, this is written as

gcf(85,100) = 5

The gcf of 85 and 100 can be obtained like this:

  • The factors of 85 are 85, 17, 5, 1.
  • The factors of 100 are 100, 50, 25, 20, 10, 5, 4, 2, 1.
  • The common factors of 85 and 100 are 5, 1, intersecting the two sets above.
  • In the intersection factors of 85 ∩ factors of 100 the greatest element is 5.
  • Therefore, the greatest common factor of 85 and 100 is 5.

Taking the above into account you also know how to find all the common factors of 85 and 100, not just the greatest. In the next section we show you how to calculate the gcf of eighty-five and hundred by means of two more methods.

How to find the GCF of 85 and 100

The greatest common factor of 85 and 100 can be computed by using the least common multiple aka lcm of 85 and 100. This is the easiest approach:

gcf (85,100) = $\frac{85 \times 100}{lcm(85,100)} = \frac{8500}{1700}$ = 5

Alternatively, the gcf of 85 and 100 can be found using the prime factorization of 85 and 100:

  • The prime factorization of 85 is: 5 x 17
  • The prime factorization of 100 is: 2 x 2 x 5 x 5
  • The prime factors and multiplicities 85 and 100 have in common are: 5
  • 5 is the gcf of 85 and 100
  • gcf(85,100) = 5

In any case, the easiest way to compute the gcf of two numbers like 85 and 100 is by using our calculator below. Note that it can also compute the gcf of more than two numbers, separated by a comma. For example, enter 85,100. The calculation is conducted automatically.

The gcf is...
Frequently searched terms on our site also include:

Use of GCF of 85 and 100

What is the greatest common factor of 85 and 100 used for? Answer: It is helpful for reducing fractions like 85 / 100. Just divide the nominator as well as the denominator by the gcf (85,100) to reduce the fraction to lowest terms.

$\frac{85}{100} = \frac{\frac{85}{5}}{\frac{100}{5}} = \frac{17}{20}$.

Properties of GCF of 85 and 100

The most important properties of the gcf(85,100) are:

  • Commutative property: gcf(85,100) = gcf(100,85)
  • Associative property: gcf(85,100,n) = gcf(gcf(100,85),n) $\hspace{10px}n\hspace{3px}\epsilon\hspace{3px}\mathbb{Z}$

The associativity is particularly useful to get the gcf of three or more numbers; our calculator makes use of it.

To sum up, the gcf of 85 and 100 is 5. In common notation: gcf (85,100) = 5.

If you have been searching for gcf 85 and 100 or gcf 85 100 then you have come to the correct page, too. The same is the true if you typed gcf for 85 and 100 in your favorite search engine.

Note that you can find the greatest common factor of many integer pairs including eighty-five / hundred by using the search form in the sidebar of this page.

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