GCF of 54 and 63


The gcf of 54 and 63 is the largest positive integer that divides the numbers 54 and 63 without a remainder. Spelled out, it is the greatest common factor of 54 and 63. Here you can find the gcf of 54 and 63, 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 54 and 63, but also that of three or more integers including fifty-four and sixty-three for example. Keep reading to learn everything about the gcf (54,63) and the terms related to it.

What is the GCF of 54 and 63

If you just want to know what is the greatest common factor of 54 and 63, it is 9. Usually, this is written as

gcf(54,63) = 9

The gcf of 54 and 63 can be obtained like this:

  • The factors of 54 are 54, 27, 18, 9, 6, 3, 2, 1.
  • The factors of 63 are 63, 21, 9, 7, 3, 1.
  • The common factors of 54 and 63 are 9, 3, 1, intersecting the two sets above.
  • In the intersection factors of 54 ∩ factors of 63 the greatest element is 9.
  • Therefore, the greatest common factor of 54 and 63 is 9.

Taking the above into account you also know how to find all the common factors of 54 and 63, not just the greatest. In the next section we show you how to calculate the gcf of fifty-four and sixty-three by means of two more methods.

How to find the GCF of 54 and 63

The greatest common factor of 54 and 63 can be computed by using the least common multiple aka lcm of 54 and 63. This is the easiest approach:

gcf (54,63) = $\frac{54 \times 63}{lcm(54,63)} = \frac{3402}{378}$ = 9

Alternatively, the gcf of 54 and 63 can be found using the prime factorization of 54 and 63:

  • The prime factorization of 54 is: 2 x 3 x 3 x 3
  • The prime factorization of 63 is: 3 x 3 x 7
  • The prime factors and multiplicities 54 and 63 have in common are: 3 x 3
  • 3 x 3 is the gcf of 54 and 63
  • gcf(54,63) = 9

In any case, the easiest way to compute the gcf of two numbers like 54 and 63 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 54,63. The calculation is conducted automatically.

The gcf is...
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Use of GCF of 54 and 63

What is the greatest common factor of 54 and 63 used for? Answer: It is helpful for reducing fractions like 54 / 63. Just divide the nominator as well as the denominator by the gcf (54,63) to reduce the fraction to lowest terms.

$\frac{54}{63} = \frac{\frac{54}{9}}{\frac{63}{9}} = \frac{6}{7}$.

Properties of GCF of 54 and 63

The most important properties of the gcf(54,63) are:

  • Commutative property: gcf(54,63) = gcf(63,54)
  • Associative property: gcf(54,63,n) = gcf(gcf(63,54),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 54 and 63 is 9. In common notation: gcf (54,63) = 9.

If you have been searching for gcf 54 and 63 or gcf 54 63 then you have come to the correct page, too. The same is the true if you typed gcf for 54 and 63 in your favorite search engine.

Note that you can find the greatest common factor of many integer pairs including fifty-four / sixty-three by using the search form in the sidebar of this page.

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