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Byju's Answer
Standard VI
Mathematics
Writing Number Patterns and Rules Related to Them
Solve the fol...
Question
Solve the following 4 × 4 Sudoku.
(3 marks)
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Solution
The solution for above sudoku is,
Explanation,
For fillinng sudoku we can start from that row and column which has maximum number of entries.
But here we have same number of entries in each row and column.
So, let's start with first 2 × 2 grid. Here we can see 2 and 4 are already present.
In first grid where 2 is present there we cannot enter 1 because it is presented in that coulumn.
So in row of 2 we will enter 1.
It's now clear that in first grid only left number is 3 which will be filled in first blank. (1 mark)
Now we have few entries so with the help of that other can be easily solved.
So in first column we have the value 3,2 and 1 so only left value is 4.
In second column we have 1, 3 and 4 so only left value is 2.
In first row 2, 3 and 4 are filled so only left value is 1. (1 mark)
In last column last 1, 3 and 4 is filled so only left value is 2
In second row1,2 and 3 are filled ony left value is 4.
In third row 1,2 and 4 is filled only left value is 3. (1 mark)
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