![](https://images-assets.nasa.gov/image/EC94-42478-03/EC94-42478-03~large.jpg?w=1536&h=1920&fit=clip&crop=faces%2Cfocalpoint)
Audience
Students
Grade Levels
Grades 5-8, Grades 9-12
Subject
Mathematics, Problem Solving
Type
Play and Learn, Coloring and Puzzles, Games
Instead of numbers, use the letters in the word “X-plane” to solve a series of 3×2 Sudoku puzzles. An answer key is provided.