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What is the GCF of 97 and 42?

The gcf of 97 and 42 is 1.

Steps to find GCF

  1. Find the prime factorization of 97
    97 = 97
  2. Find the prime factorization of 42
    42 = 2 × 3 × 7
  3. To find the gcf, multiply all the prime factors common to both numbers:

    Therefore, GCF = 1

The greatest common factor (gcf) is also known as greatest common divisor (gcd) or highest common factor (hcf).

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