To the bottom right of the number grid you should see two buttons marked with a STAR and a QUESTION MARK. These allow you to spend coins or tokens to get two kinds of hints:
1. Find Pencil Marks (★): Selecting this option will automatically enter the 'pencil marks' (the numbers that have not been eliminated as options) in all the unfilled squares in the puzzle.
2. Find A Number ('?'): Selecting this option will automatically fill in the correct number in the currently highlighted square.
1. Find Pencil Marks (★): Selecting this option will automatically enter the 'pencil marks' (the numbers that have not been eliminated as options) in all the unfilled squares in the puzzle.
2. Find A Number ('?'): Selecting this option will automatically fill in the correct number in the currently highlighted square.