**RESULT**

GCF(**81**, **18**) = **9**

**DESCRIPTIONS**

GCD is equal to the product of **the common prime factors** on the left side of the cake above.

GCF(**81**, **18**) = **3** . **3** = **9**

**OTHER INFORMATION**

The common factors of **81** and **18** are **1**, **3** and **9**. Among these numbers, the greatest one is **9**

The solution and descriptions above are generated by the GCF calculator. You can use the GCF calculator to see the greatest common factors of other numbers.

The greatest common factor (GCF) of two positive whole numbers is the largest number that divides these numbers exactly. GCF can be found by using the upside-down cake method. It is equal to the product of the common prime factors listed on the left.

ðŸ‘‰ Click here to see the GCF calculation of 81 and 18 using the prime factorization method.

ðŸ‘‰ Click here to see the LCM calculation of 81 and 18 using the cake method.

ðŸ‘‰ Click here to see the LCM calculation of 81 and 18 using the prime factorization method.