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The common prime factors of 19 and 90 are?
19 and 90 have no common prime factors.
What prime factors do 70 and 90 have in common?
2 and 5
What is the greatest common factor of 90 and 105?
The GCF of 90 and 105 is 5. The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, and 90. The factors of 105 are 1, 3, 5, 7, 15, 21, 35, and 105. The common factors are 1, 3, 5, and 15. Therefore, the greatest common factor is 15. The greatest common factor can also be determined from the prime factors, multiplying the common prime factors together. The prime factors of 90 are 2, 3, 3, and 5. The prime factors of 105 are 3, 5, and 7. The common prime factors are 3 and 5, so the greatest common factor is 3 x 5 = 15.
What is the greatest common factor of 25 and 90?
The GCF of 25 and 90 is 5.One way to determine the greatest common factor is to find all the factors of the numbers and compare them.The factors of 25 are 1, 5, and 25.The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, and 90.The common factors are 1 and 5. Therefore, the greatest common factor is 5.The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.The prime factors of 25 are 5 and 5.The prime factors of 90 are 2, 3, 3, and 5.The prime factors in common are a single 5, so the greatest common factor is 5.5 is the GFC of 25 and 90
What is the greatest common factor of 12 and 90?
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.
