1 
Inverse of identity matrix is _______ matrix: 
 A. A
 B. O
 C. A<sup>1</sup>
 D. Identity

2 
Let A,B,C be three matrices, then A(B+C) = AB + AC is known as: 
 A. Cumulative property w.r.to '+'
 B. Associative property w.r.t '+'
 C. Left distributive law
 D. Right distributive law

3 
(AB)<sup>1</sup> = 
 A. A<sup>1</sup>B<sup style="">1</sup>
 B. AB
 C. BA
 D. B<sup>1</sup>A<sup>1</sup>

4 
(AB)<sup>1</sup> = B<sup>1</sup>A<sup>1</sup> is known as: 
 A. Law of transpose of product
 B. Law of multiplicative inverse
 C. Distributive law
 D. Law of inverse of the product

5 
The idea of matrices was given by 
 A. Aurthur Cayley
 B. Briggs
 C. AlKhawarzmi
 D. Thomas Harriot

6 
The product in matrices AB, the number of columns of A must be equal to number _______ of B. 
 A. Columns
 B. Entries
 C. Rows
 D. None of these

7 
Order of matrix P = [3 2 5] is: 
 A. 3by3
 B. 3by1
 C. 1by3
 D. 1by1

8 
Which is order of square matrix 
 A. 2by2
 B. by2
 C. 2by1
 D. 3by2

9 
A square matrix M is said to be skew symmetric if M<sup>t</sup>: 

10 
The idea of matrices was given by: 
 A. Leibniz
 B. Cauchy
 C. Arthur Cayley
 D. Newton
