Math 11 Chapter 3
Matrices and Determinants
Test 1


Math Class 11
1.    If a matrix has 4 rows and 5 columns then the number of elements in that matrix is 9.


2. A square matrix A= [aij] is called diagonal matrix if aij =0 for i = j.


3.    Identity matrix is not a diagonal matrix.


4. is an identity matrix.


5. If A= [aij]2x3 andB= [bij]3x4 thenorder of (AB) is 2x4


6. The cofactor of a22 in is


7.    If all the entries in a matrix are multiplied by scalar k than whole matrix is multiplied by 3k.


8. In (AB)-1= A-1B-1 when A&B are matrices.


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