Question

write write the common factor of 18 and 21​

Answer 1

3 is the common factor of both 18 and 21

Answer 2

➠ AnSwer :-

➝ The gcf of 18 and 21 can be obtained like this:

• The factors of 18 are 18, 9, 6, 3, 2, 1.
• The factors of 21 are 21, 7, 3, 1.
• The common factors of 18 and 21 are 3, 1, intersecting the two sets above.