Ответ:

На 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30.

На 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40.

На 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50.

На 7: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70.

На 8: 8, 16, 24, 32, 40, 48, 56, 64, 72, 80.

На 9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90.