What is the GCF of 36 and 81?
The Greatest Common Factor of a set of whole numbers is the largest positive integer that divides evenly into all numbers with zero remainder.
Answer: GCF of 36 and 81 is 9
We will be calculating the GCF using the following methods:
GCF of 36 and 81 by Prime Factorization
Prime factorization of 36 and 81 is shown below
Thus, the GCF of 36 and 81 is 9
GCF of 36 and 81 by Long Division

Step 1: Divide 81 by 36 and check the remainder.

Step 2: Make the remainder of the above step as the divisor and the divisor of the above step as the dividend and perform the long division again.

Step 3: Continue till you get remainder as 0
Thus, GCF of 36 and 81 is 9
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