answersLogoWhite

0


Best Answer

3, and your welcome for answering so quickly

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is the greatest common factor of the numbers 15and 21?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What is the greatest common factor factor for 15and 50?

5


Greatest common factors of 15and 12?

The greatest common factor is three.


What is the greatest common factor of 15and 35 and 20?

The GCF is 5.


What is the greatest common factor for 15and 75?

Since 15 is a factor of 75, it is automatically the GCF.


What is the highest common factor of 15and 27?

The GCF is 3.


What is the greatest common factor of 15and 10?

Factors of 15: 1, 3, 5, 15 Factors of 10: 1, 2, 5, 10 GCF (15, 10) = 5


What are allthe lowest common factors of 15and 9?

The lowest common factor of any set of positive integers is 1.


What are the greatest common denominators of 12 and 15and 21?

The greatest common denominator of any two or more whole numbers, such as 12 15 and 21, will always be one (1) because 'common denominator' refers to the denominators of two or more fractions or mixed numbers, not whole numbers. So, a set of whole numbers (x,x) would have to be converted to their fraction equivalents, i.e., x/1, which will always yield a denominator of 1.


What is the greatest common factor of 15and 42?

Factors of 15: 1, 3, 5, 15. Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42. GCF (15, 42) = 3


What is the greatescommon factor of 15and 38?

The GCF is 1.


What is the HCF of 15and 51?

To find this you first have to identify the prime factors of each number. In this case they are: 15 = 3x5 51 = 3x17 The next step is to identify any common prime factors. In this case both numbers have a 3 as a prime factor. Therefore the HCF of 15 and 51 is 3.


What the gcm of 15 and 45?

If you mean greatest common multiple, there is none. For any multiple you find, I can find a bigger one.Perhaps you mean LCM or GCD?The GCD or GCF is 15and the LCM is 45.