0
The GCF of 10 and 21 is 1.
One way to approach this is to look at the difference between 10 and 21, which is 11. The greatest common factor of two numbers cannot be larger than the difference between the two numbers and must be a factor of the difference. The greatest common factor cannot be larger than the smallest number, so it cannot be 11. The only other factor of 11 is 1, so the greatest common factor is 1.
Another way to determine the greatest common factor is to find all the factors of the numbers and compare them.
The factors of 10 are 1, 2, 5, and 10.
The factors of 21 are 1, 3, 7, and 21.
The only common factor is 1. Therefore, the greatest common factor is 1, which means the numbers are relatively prime.
The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.
The prime factors of 10 are 2 and 5.
The prime factors of 21 are 3 and 7.
There are no prime factors in common, so the numbers are relatively prime, which means the greatest common factor is 1.
Add your answer:
Earn +20 pts
What is the greatest common factor of 16 and 21?
The greatest factor of 21 and 16 is 21, which is a factor of 21 but not of 16.
What is the greatest common factor of 21 and 75?
The greatest common factor of 21 and 75 is 3.
What is the greatest common factor of 21 and 322?
The greatest common factor of 21 and 322 is 7.
What is the greatest common factor of 105 and 147?
The greatest common factor of 105 and 147 is 21
What are the common factors and greatest common factor of 21 and 42?
The common factors of 21 and 42 are 3, 7 and 21. The greatest common factor (GCF) is 21.
What is the greatest common factor of 10 21 and 42?
The GCF (greatest common factor) would be 21.
What are the greatest common factors of 10 and 21?
The Greatest Common Factor (GCF) is: 1
What is the greatest common factor of 77 and 21?
The greatest common factor of 21 and 77 is 7.
What is the greatest common factor of 16 and 21?
The greatest factor of 21 and 16 is 21, which is a factor of 21 but not of 16.
What is the greatest common factor of 21 and 175?
The greatest common factor of 21 and 175 is 7.
What is the greatest common factor of 21 and 75?
The greatest common factor of 21 and 75 is 3.
What is the greatest common factor of 21 and9?
The Greatest Common Factor of 21, 9 is 3.
What is the greatest common factor of 21 and 322?
The greatest common factor of 21 and 322 is 7.
What is the greatest common factor of 21 and 162?
The greatest common factor of 21 and 162 is 3.
What is the greatest common factor of 21 and 102?
The greatest common factor of 21 and 102 is 3.
What is the greatest common factor for 21 and 56?
The greatest common factor of 21 and 56 is 7.
What the greatest common factor of 14 and 21?
The Greatest Common Factor of 14 and 21 is 7.
