Let's play sudoku. Here are the rules: 1, 2, 3, and 4 must occur only once in each column, row, and the 2 × 2 grid.Find out what will come in place of '?'.
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Sudoku For Kids: 360 Sudoku Puzzles for Kids | Ages 6-12 | 4x4, 6x6, 9x9 |with Solutions | Easy to Hard (Sudoku Puzzle Books for Kids): Press, Kid Wizard: 9798499970898: Amazon.com: Books