Question

If $A$ is a skew symmetric matrix of order $4$,then maximum number of distinct entries in $A$ is

• A. $12$
• B. $13$
• C. $14$
• D. $15$

Answer 1

Answer: (B)

$13$

$13$ distinct entries are required to make a skew symmetric matrix of order $4$

Option B is correct

Example:

$A=\left[\begin{array}{cccc}0& -1& -2& -3\\ 1& 0& -4& -5\\ 2& 4& 0& -6\\ 3& 5& 6& 0\end{array}\right]$