Answer :
The factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30 .
The factors of 54 are 1, 2, 3, 6, 9, 18, 27, and 54.
The factors that both numbers have in common are 1, 2, 3, and 6 .
The greatest one is 6 .
The factors of 54 are 1, 2, 3, 6, 9, 18, 27, and 54.
The factors that both numbers have in common are 1, 2, 3, and 6 .
The greatest one is 6 .