4. Matrix Algebra

Identity And Zero Matrices — Quiz

Test your understanding of identity and zero matrices with 5 practice questions.

Practice Questions

Question 1

Which matrix is the $3\times3$ identity matrix?

Question 2

What is the $2\times3$ zero matrix?

Question 3

If $A$ is a $4\times4$ matrix, what is $AI_4$?

Question 4

If $B$ is a $2\times5$ matrix, what is $0_{2\times2}B$?

Question 5

What is the value of each diagonal entry in an identity matrix?