0
The GCF of 81 and 90 is: 9
Definition: A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that the numbers have in common.
Method:
One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.
The factors of 81 are 1, 3, 9, 27, and 81.
The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, and 90.
The common factors are 1, 3, and 9. Therefore, the greatest common factor is 9.
It is not specified what greatest common is to be found out. So we can consider two cases:
1 - The factor
However we basically deal with greatest common factor so the greatest common factor of 81 and 90 is 1.
Visit the related question(below) to see how the GCF of 90 and 81 is obtained.
2 - The multiple
There are infinite common multiples between two numbers so greatest common multiple can't be calculated.
Add your answer:
Earn +20 pts
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 greatest common factor of 66 and 90?
The Greatest Common Factor (GCF) is: 6
What is the greatest common factor of 45 81 and 90?
GCF (45, 81, 90) = 9
What is the greatest common factor of 42 90 81?
The GCF is 3.
What is the gcf of 42 90and 81?
The greatest common factor of the numbers 42, 90 and 81 is 3.
What is the greatest common factor of 90 and 77?
The greatest common factor of 90 , 77 = 1
What is the greatest common factor of 90 and 112?
The greatest common factor of 90 , 112 = 2
What are the greatest common factor of 54 and 90?
The greatest common factor of 54 , 90 = 18
What is the greatest common factor of 1925 and 90?
The greatest common factor of 1925 , 90 = 5
What is the greatest common factor of 24 90?
The greatest common factor of 24 , 90 = 6
What is the greatest common factor of 90 and 243?
The greatest common factor of 90 and 243 is 9.
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 if 90 and105?
The Greatest Common Factor for 90 and 105 is 15.
What is the greatest common factor of 99 and 90?
The greatest common factor of 99 and 90 is 9.
