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It is simply the largest of the common factors. In our previous example, the largest of the common factors is 15, so the Greatest Common Factor of 15, 30 and 105 is 15 The Greatest Common Factor is the largest of the common

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To find the greatest common factor (GCF) between numbers, take each number and write it's prime factorization. Then, identify the factors common to each number and multiply those

Step 1: List the prime factors of each number. Step 2: Draw a circle around the prime factors that are common to all lists. Step 3: Multiply the numbers which you have drawn a circle around

The greatest common divisor (GCD) of two or more numbers is the greatest common factor number that divides them, exactly. It is also called the highest common factor (HCF). For

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