Solutions by » GCF of two numbers

What is the GCF of 9 and 3?

The GCF of 9 and 3 is 3.

Steps to find GCF

  1. Find the prime factorization of 9
    9 = 3 × 3
  2. Find the prime factorization of 3
    3 = 3
  3. To find the GCF, multiply all the prime factors common to both numbers:

    Therefore, GCF = 3

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The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).