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LCM & GCD

JHS

Number

Concept

Find the least common multiple and greatest common divisor.

Walkthrough

Find the GCD of 12 and 18.

  1. 1.The GCD (greatest common divisor) is the largest number that divides both values exactly.
  2. 2.List the factors of 12: 1, 2, 3, 4, 6, 12.
  3. 3.List the factors of 18: 1, 2, 3, 6, 9, 18.
  4. 4.Identify the common factors: 1, 2, 3, 6. The greatest is 6.
  5. 5.So GCD(12, 18) = 6.

Answer

6

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