First number can be 3 or 2. If it's 3, 3rd digit can't be 0, 4 or 6, o the 2nd digit must be 8. Finally the 3rd digit must be any except 0, 4 or 6. If first digit is 2, because of 370 and 376, 2nd digit must then be 7, and because of 304, the 3rd one 4.

So final answers:

274, 381, 382, 383, 385, 387, 388, and 389.

First number can be 3 or 2.

If it's 3, 3rd digit can't be 0, 4 or 6, so the 2nd digit must be 8. As 38x satisfies the condition for all guesses, then the 3rd digit can't be any of the already used numbers (0, 2, 3, 4, 6, 7 or 8).

If first digit is 2, because of 370 and 376, 2nd digit must then be 7, and because of 304, the 3rd one 4.

So final answers:

274, 381, 385 and 389.