What is the Gcf of 81 and 27?

1 Answer
Dec 14, 2016

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"