28 is a multiple of ()

Question

50 is a multiple of ()
95 is a multiple of ()
100 is a multiple of ()
123 is a multiple of ()

Answer 1

28 is a multiple of 4;

50 is a multiple of 2;
95 is a multiple of 5;
100 is a multiple of 4, 5, 10, 20, 25, and 50;
123 is a multiple of 3, 9, and 41.

Answer 2