Introduction to Matrices Quiz

What is a matrix?

• A rectangular array of numbers

• A single number

• A circular array of numbers

• A triangular array of numbers

How are the dimensions of a matrix expressed?

• Rows by diagonal

• Diagonal by rows

• Rows by columns

• Columns by rows

What is an entry in a matrix?

• A column

• A number within the matrix

• A matrix itself

• A row

Which of the following fields commonly use matrices?

• Music

• Literature

• Video game coding

• History

Under what condition can two matrices be added?

• They have the same number of rows

• They have the same number of columns

• They have the same entries

• They have the same dimensions

If matrix A is 3x2 and matrix B is 2x4, can they be added?

• No, because they have different entries

• No, because they have different dimensions

• Yes, because they have the same number of columns

• Yes, because they have the same number of rows

What is the result of subtracting matrix B from matrix D if they have the same dimensions?

• A matrix with the same dimensions

• A vector

• A matrix with different dimensions

• A scalar

What is scalar multiplication in the context of matrices?

• Adding a number to each entry of a matrix

• Subtracting a number from each entry of a matrix

• Multiplying each entry of a matrix by a number

• Dividing each entry of a matrix by a number

What happens to the dimensions of a matrix when it is multiplied by a scalar?

• They double

• They remain the same

• They halve

• They become zero

What is the result called when a matrix is multiplied by a scalar?

• Matrix product

• Row product

• Scalar product

• Vector product