Earth Day - Medium Sudoku (Planet Earth)

This Medium Sudoku puzzle features a 4x4 Sudoku puzzle to solve and a picture of the Planet Earth to color. The Sudoku puzzle is printable and changes each time you visit or click on the Refresh button below.

With this Sudoku puzzle generator, you can easily create new puzzles to use in the classroom or at home.

The puzzle also has an optional answer key checkbox that you can select, if you wish to print out the answer key.

Level of Difficulty: Medium

Sudoku Strategy: To solve the puzzle, you need to fill in the missing numbers (from 1 to 4) so that each column, row and 2x2 subgrid does not contain the same number more than once.