1. \(\left|\begin{array}{lll} 3 & 4 & 5 \\0 & 2 & 3 \\0 & 0 & 7\end{array}\right|\) = A then |A| = ?

2. For any unit matrix I

3. A matrix A = [a] is said to be symmetric if

4. A = [a] is a square matrix if

5. If A and B are square matrices then (AB)’ =

6. If \(\left|\begin{array}{ll}x & 8 \\3 & 3\end{array}\right|\) = 0, the value of x is

7. If A = \(\left[\begin{array}{cc}α & 2 \\2 & α\end{array}\right]\) and |A³| = 25 then α is

8. A² – A + I = 0 then the inverse of A

9. If a matrix is both symmetric matrix and skew symmetric matrix then

10. Total number of possible matrices of order 3 × 3 with each entry 2 or 0 is