Chapter 7: Matrices and Determinants - Online Test
Q1. If aij
= 1/2 (3i − 2j ) and A = [a ij] 2×2 is
Answer : Option B
Explaination / Solution:
Q2. What must be the matrix X, if 
Answer : Option A
Explaination / Solution:
Q3. Which one of the following is not true about the
matrix 
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. If A and B are two matrices such that A + B and
AB are both defined, then
Answer : Option B
Explaination / Solution:
Q5. If A = 
then for what value of λ, A2
= O ?
then for what value of λ, A2
= O ?
Answer : Option B
Explaination / Solution:
Q6. If 
and ( A + B )2 = A2
+ B2 then the values of a
and b are
and ( A + B )2 = A2
+ B2 then the values of a
and b are
Answer : Option B
Explaination / Solution:
Q7. If 
is a matrix satisfying the
equation AAT = 9I, where I is
3 × 3 identity matrix, then the ordered pair (a, b) is equal to
is a matrix satisfying the
equation AAT = 9I, where I is
3 × 3 identity matrix, then the ordered pair (a, b) is equal to
Answer : Option D
Explaination / Solution:
Q8. If A is a square matrix, then which of the following is not symmetric?
Answer : Option D
Explaination / Solution:
Q9. If A and B are symmetric matrices of order n, where ( A ≠ B), then
Answer : Option B
Explaination / Solution:
Q10. If A = 
and if xy = 1, then det ( AAT ) is equal to
and if xy = 1, then det ( AAT ) is equal to
Answer : Option D
Explaination / Solution:
