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Number Detective

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Did you know that ancient traditional mazes often tell a story? Remembering the story helps you to draw the maze.

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The Naked Pair in Sudoku

A particular technique for solving Sudoku puzzles, known as "naked pair", is explained in this easy-to-read article.

What Am I?

Stage: 2 Challenge Level: Challenge Level:1
Can you narrow down some of the shape's characteristics from the cards?
How are you keeping track of what you know so far?