This easy Sudoku puzzle features the lowercase letters a, b, c, and d! Solve the puzzle by writing each letter only once in each row, column, and block.

Take brain teasers to the next level with this extra-challenging magic square puzzle that features decimals!

Help your fourth grader solve her way to Sudoku Island by completing this classic number placement puzzle.

Solve a sunny, summery sudoku puzzle in this sandcastle-themed puzzle!

In autumn, the leaves turn red, orange, and yellow—test your logic skills with a sudoku puzzle to match!