What is a matrix in mathematics?

• A rectangular array of numbers
• A single number
• A geometric shape
• An equation

What is the order of a matrix that has 3 rows and 4 columns?

• 3x4
• 4x3
• 3x3
• 4x4

If matrix A is of order 2x3 and matrix B is of order 3x2, what is the order of the resulting matrix after multiplication?

• 2x3
• 3x3
• 2x2
• 3x2

What is the identity matrix?

• A matrix with all zeros
• A matrix with ones on the diagonal and zeros elsewhere
• A matrix with all ones
• A diagonal matrix with different numbers

How do you add two matrices?

• By adding corresponding elements
• By multiplying corresponding elements
• By subtracting corresponding elements
• By dividing corresponding elements

Which operation is not defined for matrices?

• Addition
• Subtraction
• Division
• Multiplication

What does it mean for two matrices to be equal?

• They have the same order and corresponding elements are equal
• They have the same number of elements
• They have the same determinant
• They are both identity matrices

What is a scalar multiplication of a matrix?

• Multiplying each element by a constant
• Adding a constant to each element
• Dividing each element by a constant
• Subtracting a constant from each element

Which of the following operations is not possible on matrices?

• Addition of matrices with different dimensions
• Multiplication of matrices
• Finding the inverse of a matrix
• Transposing a matrix

What is necessary for two matrices to be multiplied?

• Number of columns in the first matrix must equal the number of rows in the second
• Both matrices must be square matrices
• Both matrices must have the same dimensions
• Number of rows in the first matrix must equal the number of columns in the second

What is the effect of multiplying a matrix by the identity matrix?

• The matrix is unchanged
• The matrix becomes zero
• The matrix is transposed
• The matrix is inverted

Find the inverse matrix of R.

Calculate the value of x.

• 3

The value of y-x is

• -3

• - 3

If P=Q, find the value of x.

• -2

• - 2

Which of the following has an inverse matrix?

Find matrix M.

A square matrix has the same number of rows and columns.

If a matrix has 2 rows and 3 columns, it is called a 2x3 matrix.

A row matrix only has one row.