CUET Mathematics 2022 10 Aug Shift 1 PYQs

If $A = \begin{bmatrix} a & 1 & -1 \\ 0 & b & 4 \\ 4 & 4 & c \end{bmatrix}$ and $abc = 12$, $b = 4a$, then the value of $|A(adjA)|$ is:

Let A be a square matrix of order 3 then |3A| is equal to

If A and B are skew-symmetric matrices, then which one of the following is NOT true?