One method to determine the greatest usual factor is to uncover all the factors of the numbers and compare them.

The factors of 54 space 1, 2, 3, 6, 9, 18, 27, and also 54.

The components of 81 are 1, 3, 9, 27, and also 81.

The common factors room 1, 3, 9, and 27. Therefore, the greatest typical factor is 27.

The greatest typical factor can also be calculated by identifying the typical prime factors and also multiplying castle together.

The prime determinants of 54 space 2, 3, 3, and also 3.

The prime components of 81 space 3, 3, 3, and also 3.

The prime components in common are 3, 3, and also 3, therefore the greatest common factor is 3 x 3 x 3 = 27. Determinants of 54: 1 2 3 6 9 18 27 54 factors of 81: 1 3 9 27 81 The GCF of 54 and also 81 is 27The Greatest common Factor (GCF) is: 27 .

27.

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