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Greatest common factor (GCF)

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Learn it The greatest common factor (GCF) is the biggest number that divides evenly into all the numbers. List the factors and find the largest one they share.

Example: Find the GCF of 24 and 36.

  1. Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24.
  2. Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36.
  3. Common factors: 1, 2, 3, 4, 6, 12. The GCF is 12.

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