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  • INDIAN NAVY SAILORS Numerical Ability Study Material

Digitization help student to explore and study their academic courses online, as this gives them flexibility and scheduling their learning at their convenience. Kidsfront has prepared unique course material of Numerical Ability Matrices for INDIAN NAVY SAILORS student. This free online Numerical Ability study material for INDIAN NAVY SAILORS will help students in learning and doing practice on Matrices topic of INDIAN NAVY SAILORS Numerical Ability. The study material on Matrices, help INDIAN NAVY SAILORS Numerical Ability students to learn every aspect of Matrices and prepare themselves for exams by doing online test exercise for Matrices, as their study progresses in class. Kidsfront provide unique pattern of learning Numerical Ability with free online comprehensive study material and loads of INDIAN NAVY SAILORS Numerical Ability Matrices exercise prepared by the highly professionals team. Students can understand Matrices concept easily and consolidate their learning by doing practice test on Matrices regularly till they excel in Numerical Ability Matrices.


Matrices

If two matrices A and B are of order p × q and r × s respectively, can be subtracted only, if


a) P = q
b) P = q , r = s
c) P = r , q = s
d) P = s , q = r



Answer
Correct Answer Is : P = r , q = s
Solution Is :
If I = , J = and B = , then B equals?

a) I sin θ + J cos θ
b) I cos θ - J sin θ
c) I cos θ + J sin θ
d) (-I cos θ + J sin θ)



Answer
Correct Answer Is : I cos θ + J sin θ
Solution Is :
If the trace of a matrix A is 5, then the trace of the matrix 3A is?

a) 5/3
b) 3/5
c) 15
d) 8



Answer
Correct Answer Is : 15
Solution Is :
If A and B are two matrices such that A + B and AB are both defined, then

a) Number of columns of A = Number of rows of B
b) A and B are square matrices of same order
c) A and B are two matrices not necessarily of same order
d) None of these



Answer
Correct Answer Is : A and B are square matrices of same order
Solution Is :
If 2A + 3B = and A + 2B = , then B is equal to?

a)
b)
c)
d)



Answer
Correct Answer Is :
Solution Is :
What must be the matrix X, if 2X + = ?

a)
b)
c)
d)



Answer
Correct Answer Is :
Solution Is :
If A = is singular, then the possible values of x are?

a) 0, 12, -12
b) 0, 5, -5
c) 0, 1, -1
d) 0, 4, -4



Answer
Correct Answer Is : 0, 12, -12
Solution Is :
For how many values of x in the closed interval [-4, -1] is the matrix A = singular?

a) 0
b) 1
c) 2
d) 3



Answer
Correct Answer Is : 1
Solution Is :
If A = diag (2, -1, 3), B = diag (-1, 3, 2), then (A2)B = ?

a) B
b) Diag (3, 1, 8)
c) Diag (-4, 3, 18)
d) Diag (5, 4, 11)



Answer
Correct Answer Is : Diag (-4, 3, 18)
Solution Is :
If A and B are square matrices of order 2, then (A + B)2 = ?

a) A2 + AB + BA + B2
b) A2 + 2BA + B2
c) A2 + 2AB + B2
d) A2 + BA + B2



Answer
Correct Answer Is : A2 + AB + BA + B2
Solution Is :