Please use logical thinking instead of guessing! Each puzzle only has one solution.
There are a lot of 4x4 sudoku puzzles for download. There are 5 difficulty levels, sudoku for kids,easy,hard,expert and extreme 4x4 sudoku puzzles.
The document is in pdf format. Each document has 8 4x4 sudoku puzzles, and the end of each document is the answer to the 4x4 sudoku puzzles.
Here is a blank 4x4 sudoku grid that may be useful in the process of solving the 4x4 sudoku puzzle.