i need help on math

Factors are numbers you multiply together to get another number.

The factors of 11 are: 1 and 11

The factors of 33 are: 1, 3, 11, and 33 (because 1x33= 33, and 3x11=33)

Therefore, the greatest common factor is the largest factor that both numbers have in common and in this case the greatest common factor is 11.