What is the greatest common factor of 66 and 18?

1 Answer
Nov 15, 2016

#HCF = 2xx3 = 6#

Explanation:

You can use the product of prime factors to find both the HCF and LCM of any numbers

#" "18 = 2 xx 3 xx 3#
#" "66 =2 xx 3" "xx 11#

#HCF = 2xx3 = 6#

The common factors of 18 and 66 are 2 and 3.
The HCF is the product of 2 and 3.#HCF = 2xx3 = 6#