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EzraTo find the common prime factor of 21 and 411, we need to first factorize both numbers. The prime factorization of 21 is 3 x 7, and the prime factorization of 411 is 3 x 137. The common prime factor between 21 and 411 is 3, as it appears in the prime factorization of both numbers.
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WHAT ARE THE COMMON PRIME FACTOR IN THIS PAIR OF NUMBERS 21 AND 411?
3
What is the common prime factor of 6 and 21?
It is 3
What is the greatest common factor of 21 42 49?
To find the greatest common factor of 21, 42, and 49, we first need to find the prime factors of each number. The prime factors of 21 are 3 and 7, the prime factors of 42 are 2, 3, and 7, and the prime factors of 49 are 7 and 7. The greatest common factor is the product of the common prime factors raised to the lowest power they appear in any of the numbers, which in this case is 7. Therefore, the greatest common factor of 21, 42, and 49 is 7.
What is the greatest common factor of 21 and 45?
The GCF of 21 and 45 is 3. One way to determine the greatest common factor is to find all the factors of the numbers and compare them. The factors of 21 are 1, 3, 7, and 21. The factors of 45 are 1, 3, 5, 9, 15, and 45. The common factors are 1 and 3. Therefore, the greatest common factor is 3. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 21 are 3 and 7. The prime factors of 45 are 3, 3, and 5. The prime factors in common are a single 3, so the greatest common factor is 3.
What is the greatest common factor of 21 and 56?
The greatest, (Highest) Common Factor of 21 and 56 is 7
