Question

answer......................

Answer 1

Answer:

30 is the greatest common factor..

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Answer 2

Answer:

The greatest common factor of 210 and 90 is 30.

Step-by-step explanation:

calculate the prime factors of 90 and 210, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 90 and 210.