An identity matrix I is a diagonal matrix with all diagonal elements are _____________.

• A) 1
• B) any number
• C) 0
• D) the same number

Solution of linear equation; 0x+8 = 5 ………….

• A) -3
• B) Can never be determined
• C) 0
• D) -13

If A and B are both m×n matrices then A+B exists and is an ______ matrix.

• A) n×n
• B) m×n
• C) m×m
• D) n×m

Can we subtract a negative integer k from identity matrix of any dimension?

• A) No
• B) Yes
• C)
• D)

Let Accumulating Factor (AF) = 26.24 and
Accumulating value (AV) = 26764.8
Then Annuity is……..

• A) 1420
• B) 1320
• C) 1020
• D) 1120

If $A = \left[ {\begin{array}{*{20}{c}} \begin{gathered} 1 \hfill \\ 0 \hfill \\ 1 \hfill \\ \end{gathered} &\begin{gathered} 2 \hfill \\ 0 \hfill \\ 1 \hfill \\ \end{gathered} \end{array}} \right]$ and $B = \left[ {\begin{array}{*{20}{c}} \begin{gathered} 2 \hfill \\ 2 \hfill \\ 0 \hfill \\ \end{gathered} &\begin{gathered} 2 \hfill \\ 2 \hfill \\ 0 \hfill \\ \end{gathered} \end{array}} \right]$ then $A+B$ will be __________.

• A) $$\left[ {\begin{array}{*{20}{c}} \begin{gathered} 3 \hfill \\ 2 \hfill \\ 1 \hfill \\ \end{gathered} &\begin{gathered} 4 \hfill \\ 1 \hfill \\ 1 \hfill \\ \end{gathered} \end{array}} \right]$$
• B) $$\left[ {\begin{array}{*{20}{c}} \begin{gathered} 3 \hfill \\ 2 \hfill \\ 1 \hfill \\ \end{gathered} &\begin{gathered} 4 \hfill \\ 2 \hfill \\ 1 \hfill \\ \end{gathered} \end{array}} \right]$$
• C) $$\left[ {\begin{array}{*{20}{c}} \begin{gathered} 3 \hfill \\ 0 \hfill \\ 1 \hfill \\ \end{gathered} &\begin{gathered} 4 \hfill \\ 2 \hfill \\ 0 \hfill \\ \end{gathered} \end{array}} \right]$$
• D) $$\left[ {\begin{array}{*{20}{c}} \begin{gathered} 2 \hfill \\ 1 \hfill \\ 2 \hfill \\ \end{gathered} &\begin{gathered} 1 \hfill \\ 2 \hfill \\ 1 \hfill \\ \end{gathered} \end{array}} \right]$$

A rate with a denominator of 1 is called a unit rate.

• A) No
• B) yes
• C)
• D)

The order of a matrix consists of ____________.

• A) Number of Rows × Number of Columns
• B) Number of Columns × Number of Rows
• C) Number of Rows = Number of Columns
• D) Number of Rows + Number of Columns

The formula C * [((1 + i)^n – 1)/i] is used to find the value of……….

• A) Present value of annuity
• B) Amount of annuity
• C) Accumulation factor
• D) Future value of the annuity

What is the dimension of a matrix?

• A) The number of rows in the matrix.
• B) The number of non-zero elements in the matrix.
• C) The number of rows by the number of columns in the matrix.
• D) The number of columns in the matrix.

If $A = \left[ {\begin{array}{*{20}{c}} \begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} &\begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} &\begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} \end{array}} \right]$ and $B = \left[ {\begin{array}{*{20}{c}} 1 \\ 1 \\ 1 \end{array}} \right]$ then the matrix $AB$ wil be ______________.

• A) \[\left[ {\begin{array}{*{20}{c}} 2&2&2 \end{array}} \right]\]
• B) $\left[ {\begin{array}{*{20}{c}} 6 \\ 0 \end{array}} \right]$
• C) $\left[ 2 \right]$
• D) $\left[ {\begin{array}{*{20}{c}} \begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} &\begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} &\begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} \end{array}} \right]$

Two matrices A and B may be added together provided that they have the __________ number of rows and columns.

• A) different
• B) same
• C)
• D)

${\text{If }}i = 5\% {\text{ and }}n = 10{\text{, then the accumulation factor AF is equal to __________}}{\text{.}}$

• A) $11.58$
• B) $12.58$
• C) $12.85$
• D) $11.85$

Matrix multiplication is only possible if the row matrix and the column matrix have the __________ number of elements.

• A) same
• B) different
• C)
• D)

Two matrices $A$ and $B$ are said to be confirmable for multiplication if __________.

• A) the number of columns in matrix $A$ is equal to the number of rows in matrix $B$
• B) the number of rows in matrix $A$ is equal to the number of rows in matrix $B$
• C) the number of rows in matrix $A$ is equal to the number of columns in matrix $B$
• D) the number of columns in matrix $A$ is equal to the number of columns in matrix $B$

a (A + B) = ___________

• A) a A + a B
• B) a A + B
• C) A + B
• D) A + a B

What is the dimension of a matrix?

• A) The number of rows by the number of columns in the matrix.
• B) The number of non-zero elements in the matrix.
• C) The number of rows in the matrix.
• D) The number of columns in the matrix.

\({\rm{If}}\,{\rm{ }}A = \left[ {\begin{array}{*{20}{c}} 2\\ 3\\ 0 \end{array}} \right]{\rm{ and }}B = \left[ {\begin{array}{*{20}{c}} { - 1}&0&6 \end{array}} \right]{\rm{ then}}\;AB = \_\_\_\_\_\_\_\_\_\_.\)

• A) \(\left[ {\begin{array}{*{20}{c}} 1&3&6 \end{array}} \right]\)
• B) \(\left[ { - 2 } \right]\)
• C) \(\left[ {\begin{array}{*{20}{c}} 1\\ 3\\ 6 \end{array}} \right]\)
• D) \(\left[ {\,7\,} \right]\)

If a matrix A has n rows and n columns then we say it's a _________ matrix.

• A) square
• B) scalar
• C) diagonal
• D) rectangle

Annuity is …..

• A) A series of fixed payment for any period of time
• B) A series of fixed payment for a fixed period of time
• C) A series of any. payments for a fixed period of time
• D) None of these