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10 grade maths

What is the GCF of 40, 60, 80?

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10 Months agoGrade
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1 Answer

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ApprovedApproved Tutor Answer10 Months ago

The greatest common factor (GCF) of a set of numbers is the largest number that divides all of them without leaving a remainder. To find the GCF of 40, 60, and 80, we can use the method of listing the factors or prime factorization.

Finding Factors

Let's list the factors of each number:

  • Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40
  • Factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
  • Factors of 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Identifying Common Factors

The common factors among these numbers are:

  • 1
  • 2
  • 4
  • 5
  • 10
  • 20
  • 40

Determining the GCF

The largest number in the list of common factors is 20. Therefore, the GCF of 40, 60, and 80 is:

Final Answer

20

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