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What is the greatest common factor of 490 and 420?

Updated: 8/20/2019
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11y ago

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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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15y 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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