The common factors are: 1, 2, 5, 10
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The common factors of 20 and 50 are: 1, 2, 5, 10.
The common factors are: 1, 2, 5, 10, 25, 50.
Since 50 is a factor of 350, all of its factors are common.
Answer: 2 One way to determine the greatest common factor is to find all the factors of the numbers and compare them. The factors of 22 are 1, 2, 11, and 22. 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. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 22 are 2 and 11. The prime factors of 50 are 2, 5, and 5. The prime factors in common are a single 2, so the greatest common factor is 2.
The factors of 50 are: 1, 2, 5, 10, 25, 50