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The factors of 12 are 1, 2, 3, 4, 6, and 12.
The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, and 90.
The common factors are 1, 2, 3, and 6, so the greatest common factor is 6.
You can also determine this from the prime factors.
The prime factors of 12 are 2, 2, and 3.
The prime factors of 90 are 2, 3, 3, and 5.
The prime factors they have in common are 2 and 3, so the greatest common factor is 2 x 3 = 6.
What else can I help you with?
What is the greatest common factor of 90 and 130?
The greatest common factor of 90 and 130 is 10.
What is the greatest common factor of 18 and 90?
Since 18 is a factor of 90 and it is the largest factor of itself, the greatest common factor of 18 and 90 is 18.Since 18 is a factor of 90, it is automatically the GCF.
What is the greatest common factor of 15 45 and 90?
The greatest common factor of 15,45, and 90 is 15.
What is the greatest common factor of 90 30 45?
The greatest common factor of 90 , 30 , 45 = 15
What is the common factor of 54 and 90?
The greatest common factor of 54 and 90 is 18.
