# 11th Business Mathematics MCQS Chapter 5

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The order of matrix [a]
1 x 1
0 x 1
2 x 1
1 x 0

If A = [aij], then A+ is :
[bji]
[aij]
[aji]
[aii]

We cannot find the inverse of a:
Diagonal matrix
Triangular matrix
Singular matrix
Square matrix

Do AB = BA?
Yes
None of these
May or may not
Never

A square matrix whose elements below the main diagonal are all zero is called.
Upper triangular matrix
Lower triangular matrix
Rectangular
Row matrix

If A is  a singular matrix then:
A ? 0
A = 0
|A| ? 0
|A| = 0

Order of the matrix having m rows and n columns is:
m x n
m / n
m + n
m – n

If Ax = B then x is
AB
A-1 B
B/A
BA-1

In a square matrix number of rows and column are
Equal
Now equal
Greater
Less then

In decimal system base of system is:
10
2
8
5

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