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Factors of 490: 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490.

Factors of 420: 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420.

GCF (490, 420) = 70

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11y ago
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16y ago

Unless I'm failing to understand the question, I'd say the answer is 70. 70X7=490, and 70X6=420.

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Q: What is the greatest common factor of 490 and 420?
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What is the highest common factor of 420 and 490?

The GCF is 70.


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What are the common factors and greatest common factor of 490?

Short answer: There are none. There is neither a greatest common factor nor common factors of a single number, such as 490, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor.


What is the greatest common factor of 980 and 3430?

The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.The greatest common factor of 980 and 3430 is 490


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70-490 = -420