Sagot :
Answer:
There are 3 common factors of 18 and 27, that are 1, 3, and 9. Therefore, the highest common factor of 18 and 27 is 9.
hope it helps! <33
The factors of 18 are 1, 2, 3, 6, 9, 18. The factors of 27 are 1, 3, 9, 27. The common factors of 18 and 27 are 1, 3 and 9. The greatest common factor of 18 and 27 is 9.