The factors of 12 are 1, 2, 3, 4, 6, and 12.
The factors of 50 are 1, 2, 5, 10, 25, and 50.
The common factors are 1 and 2. Therefore, the least (smallest) common factor is 1.
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The least common factor of any set of integers is 1.
The least common factor is 1. (The least common factor of any two or more positive integers is always 1.)
The factors of 20 are 1, 2, 4, 5, 10, and 20. The factors of 50 are 1, 2, 5, 10, 25, and 50. The common factors of 20 and 50 are 1, 2, 5, and 10. Therefore, the least common factor (the smallest common factor) is 1.
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A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common. One way to determine the greatest common factor is to find all the factors of the numbers and compare them. The factors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 50 are 1, 2, 5, 10, 25, and 50. The common factors are 1 and 2. Therefore, the greatest common factor is 2.