Question

Find the missing number in the given sudoku.
$$\begin{array}{cccc}1& 4& 3& 2\\ 3& 2& 1& 4\\ 4& 1& 2& 3\\ 2& ?& 4& 1\end{array}$$

• A. 3

Answer 1

The correct option is A 3
In a soduku. the sum of numbers in each row or column must be equal to the sum of numbers in other row or column.
Consider, the first row, here the sum of the numbers is 10, in second row it is also 10, in columns also the sum of the numbers in first and third is 10.

$\therefore$ the sum of all the numbers present in the fourth row must also be 10. Let's assume the unknown value as $x$.

$\Rightarrow 2+x+4+1=10$
$\Rightarrow x=10-1-4-2$
$\Rightarrow x=3$