Explanation Given: The given Sudoku puzzle is, 7 1 2 8 6 7 4 1 4 3 5 8 1 2 4 8 9 1 2 5 8 4 3 6 3 8 2 9 Approach: The given Sudoku puzzle is, 7 1 2 8 6 7 4 1 4 3 5 8 1 2 4 8 9 1 2 5 8 4 3 6 3 8 2 9 Table (1) In the given grid box each box can be assigned a number from 1 to 9. Start from the upper-left corner and move till upper-right corner then move from left to right until each number is assigned. Assign each box a coordinate ( x , y ) based on its row number x and column number y as shown in figure (1). Figure (1) From the given Sudoku puzzle it can be seen that the column 1 and 3 have digit 4. The digit 4 can be placed in the coordinate ( 8 , 2 ) . The digit 4 can be placed in the coordinate ( 5 , 5 ) as the row 7 and 8 already has 4. The digit 2 can be placed in the coordinate ( 2 , 7 ) , ( 7 , 5 ) , ( 4 , 2 ) and ( 8 , 1 ) as rows already has 2. The digit 3 can also be placed in the coordinate ( 6 , 4 ) as the row 4 and column 5 already has 3. The digit 6 can be placed in the coordinate ( 5 , 5 ) . The digit 4 can be placed in the coordinate ( 6 , 8 ) and ( 2 , 9 )

MATHEMATICS A PRACTICAL ODYSSEY W/ACCESS

8th Edition

ISBN: 9780357537343

Author: Johnson

Publisher: CENGAGE L

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Chapter 1.1, Problem 64E

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The given Sudoku puzzle.

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Chapter 1.1, Problem 63E

Chapter 1.1, Problem 65E

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To solve:

The given Sudoku puzzle.