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Post-Assessment

Module 8: Introduction to Matrices

About This Assessment

This post-assessment measures your learning gains after completing Module 8. Comparing your pre- and post-assessment results helps us understand how much you learned!

Time: 5-10 minutes | Questions: 5 | Purpose: Measure learning gains

Question 1

What is the dimension of the matrix B = [[5, 6], [7, 8], [9, 10]]?

A. 2 x 3
B. 3 x 2
C. 2 x 2
D. 3 x 3

Question 2

If A = [[5, 2], [3, 1]] and B = [[1, 0], [0, 1]], what is A - B?

A. [[4, 2], [3, 0]]
B. [[6, 2], [3, 2]]
C. [[4, 2], [3, 1]]
D. [[5, 0], [0, 1]]

Question 3

What is the determinant of the matrix A = [[5, 3], [2, 4]]?

A. 14
B. 26
C. 20
D. 6

Question 4

If the determinant of a 2 x 2 matrix is zero, what can we conclude?

A. The matrix is invertible
B. The matrix is not invertible
C. The matrix is the identity matrix
D. The matrix must be a zero matrix

Question 5

If A = [[3, 1], [2, 4]] and B = [[2, 0], [1, 3]], what is the product AB (second row, second column entry)?

A. 8
B. 12
C. 14
D. 16

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