Matrices

 If a matrix has equal number of columns and rows then it is said to be a
If A is a square matrix, then $$adjA^T - (adjA)^T $$ is equal to 
Transform $$\left[ \begin{matrix} 1 & -1 & 2 \\ 2 & 1 & 3 \\ 3 & 2 & 4 \end{matrix} \right] $$ into an upper triangular matrix by suitable column transformations
The number of possible orders of a matrix containing $$24$$ elements are:
If A is a symmetric and B skew-symmetric matrix and $$A + B$$ is nonsingular and  $$C= (A + B)^{-1} (A - B),$$ then