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The only common factor that 13 and 18 have is 1.
One way to determine common factors is to find all the factors of the numbers and compare them.
The factors of 13 are 1 and 13.
The factors of 18 are 1, 2, 3, 6, 9, and 18.
The only common factor is 1.
Therefore, the least (smallest) common factor is 1 and the greatest (highest) common factor is 1.
The least common factor of any set of integers is 1.
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What is the least common factor of 18 and 33?
The least common factor of 18 and 33 is 1.The factors of 18 are 1, 2, 3, 6, 9, and 18.The factors of 33 are 1, 3, 11, and 33.The common factors of 18 and 33 are 1 and 3. Therefore, the least common factor (the smallest common factor) is 1.Note: Because the least common factor of two or more positive integers is always 1, this is not usually asked.trick questionThe least common factor is: 1The least common factor of any set of integers is 1.
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