Can you multiply matrices of these sizes?

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Julia Goedecke

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From users who are members of Linear Algebra 1st year :

Iain Gunn	said	Ready to use	4 years, 6 months ago
Julia Goedecke	said	Needs to be tested	4 years, 6 months ago

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Iain Gunn 4 years, 6 months ago

Gave some feedback: Ready to use

○

Julia Goedecke 4 years, 6 months ago

Gave some feedback: Needs to be tested

○

Julia Goedecke 4 years, 6 months ago

Published this.

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Julia Goedecke 4 years, 6 months ago

Created this as a copy of Can you multiply these matrices? (same as WBQ 1.28).

Name	Status	Author	Last Modified
Can you multiply these matrices? (same as WBQ 1.28)	Ready to use	Julia Goedecke	25/08/2021 12:57
Can you multiply matrices of these sizes?	Ready to use	Julia Goedecke	25/08/2021 12:57
Matrix products and transposes (same as WBQ 1.31)	Ready to use	Julia Goedecke	25/08/2021 12:57
Matrix products: any combination from WBQ 1.28/1.31	Ready to use	Julia Goedecke	25/08/2021 12:57
Matrix multiplication	Ready to use	Julia Goedecke	25/08/2021 12:57
copy of Matrix products and transposes (same as WBQ 1.31)	Ready to use	Julia Goedecke	25/08/2021 12:57
Matrix multiplication	Ready to use	Julia Goedecke	25/04/2022 09:56

There are 34 other versions that do you not have access to.

Question statement

Let $A$ be a $\var{m}\times\var{n}$ matrix, and $B$ a $\var{k}\times\var{l}$ matrix.

Give any introductory information the student needs.

			Name	Type	Generated Value

m	integer	4
n	integer	3
k	integer	5
l	integer	4
solution	string	NA
solutionBA	string	5x3

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(2..5)

JME function reference

Description

Describe what this variable represents, and list any assumptions made about its value.

Can an exam override the value of this variable?

Generated value: `integer`

This variable doesn't seem to be used anywhere.

Parts

Gap-fill
1. Gap Gap 0. Match text pattern
  Add
2. Gap Gap 1. Match text pattern
  Add

Gap-fill

Ask the student a question, and give any hints about how they should answer this part.

Determine whether the product exists. If the product exists, then enter the size of the result matrix as mxn, using the correct numbers instead of m and n. If the product does not exist, enter NA.

$AB$ : Gap 0.

$BA$ : Gap 1.

Advice

We can multiply an $m\times k$ matrix and a $k\times n$ matrix, i.e. the number of columns of the first matrix and the number of rows of the second matrix have to match. The resulting product has size $m\times n$ .

You can see the correct solution above.

Give a worked solution to the whole question.

Use this tab to check that this question works as expected.

There was an error which means the tests can't run:

Part	Test	Passed?
Gap-fill
Gap-fill		Hasn't run yet
Match text pattern
Match text pattern		Hasn't run yet
Match text pattern
Match text pattern		Hasn't run yet

This question is used in the following exams:

Numbas Assignment 2 by Julia Goedecke in Linear Algebra 1st year.
Linear algebra by Farai Nechikwira in Farai's workspace.

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Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Checkpoint description

Iain Gunn 4 years, 6 months ago

Julia Goedecke 4 years, 6 months ago

Julia Goedecke 4 years, 6 months ago

Julia Goedecke 4 years, 6 months ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

Loading...

Error

Can you multiply matrices of these sizes?

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

Iain Gunn 4 years, 6 months ago

Julia Goedecke 4 years, 6 months ago

Julia Goedecke 4 years, 6 months ago

Julia Goedecke 4 years, 6 months ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

Generated value: `integer`