Here, is partially filled 4 × 4 Sudoku. What is the value of a, b, c and d?

c a 3 4

b d 1 2

2 1 4 3

4 3 2 1

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Solution

The value of a,b,c and d are
a = 2
b = 3
c = 1
d = 4
Explanation,

For the value of 'a' it can be said that 3 and 4 are in row and for column 1 and 3 so only possible value for 'a' is 2.

For the value of 'b' it can be said that 1 and 2 are in row nd for column 2 and 4 so only possible value for 'b' is 3.

For the value of 'c' it can be said that 2 , 3 and 4 are in row and for column as well so only possible value for 'c' is 1.

For the value of 'd' it can be said that 2 × 2 grid of unknown has value 2,3 and 1 so only possible value for 'd' is 4.

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Here, is partially filled 4 × 4 Sudoku. What is the value of a, b, c and d?​ c a 3 4 b d 1 2 2 1 4 3 4 3 2 1

Here, is partially filled 4 × 4 Sudoku. What is the value of a, b, c and d?

c a 3 4

b d 1 2

2 1 4 3

4 3 2 1