Question

What is the missing number in the given sudoku?

$\begin{array}{ccc}7& 4& 2\\ 2& 7& 4\\ ?& 2& 7\end{array}$

• A. 4
• B. 13
• C. 2
• D. 7

Answer 1

Answer: (A)

4

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 13, in second row it is also 13, in columns also the sum of the numbers in second and third is 13.

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

$\Rightarrow x+2+7=13$
$\Rightarrow x=13-2-7$
$\Rightarrow x=4$