Question

What is the Gcf of 81 and 27?

Answer 1

`27`

Explanation:

This method uses only `color(blue)"subtraction"` to find the GCF.

`•" subtract smaller number from larger number"`

`•" Repeat this until a common value is obtained"`

`•" The common value is the GCF"`

`" The starting numbers are 81 and 27"`

`rArr81-27=54rarr" numbers are now 54 and 27"`

`rArr54-27=27rarr" numbers are now 27 and 27"`

`" common value of 27 reached"`

`" Hence GCF = 27"`