Answer :
Common factors of 50: 1, 2, 5, 10, 25, 50
Common factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
Common factors of 100: 1, 2, 4, 5, 10, 20, 25, 50, 100
You're welcome.
Common factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
Common factors of 100: 1, 2, 4, 5, 10, 20, 25, 50, 100
You're welcome.
Factors of 30 = 1, 2, 3, 5, 6, 10, 15, 30
Factors of 50 = 1, 2, 5, 10, 25, 50
Factors of 100 = 1, 2, 4, 5, 10, 20, 25, 50, 100
common factors are: 1, 2, 5, 10
Hope that helps :D