NB1 - Inequalities (understanding notation) - Numbas at mathcentre.ac.uk

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From users who are members of Skills Audits for Maths and Stats :

Will Morgan	said	Ready to use	1 year, 1 month ago
Andrew Neate	said	Needs to be tested	1 year, 2 months ago

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Will Morgan 1 year ago

Published this.

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Will Morgan 1 year, 1 month ago

Gave some feedback: Ready to use

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Will Morgan 1 year, 1 month ago

Gave some feedback: Needs to be tested

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Andrew Neate 1 year, 2 months ago

Gave some feedback: Needs to be tested

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Andrew Neate 1 year, 2 months ago

Created this as a copy of Truth of inequalities (

$\ge$ vs

$\gt$ ).

Name	Status	Author	Last Modified
Truth of inequalities ( $\le$ vs $\lt$ )	Ready to use	Don Shearman	07/07/2023 05:24
Truth of inequalities ( $\ge$ vs $\gt$ )	Ready to use	Don Shearman	07/07/2023 05:24
Truth of inequalities ( $\le$ vs $\lt$ ) including absolute values	Ready to use	Don Shearman	07/07/2023 05:24
Truth of inequalities ( $\ge$ vs $\gt$ ) including absolute values	Ready to use	Don Shearman	07/07/2023 05:24
NB1 - Inequalities (understanding notation)	Ready to use	Andrew Neate	10/04/2024 09:13

There are 2 other versions that do you not have access to.

Question statement

Give any introductory information the student needs.

			Name	Type	Generated Value

a	integer	10
operations	list	List of 2 items
values	list	[ 10, -1, 13, 15 ]
disp_values	list	[ -1, 10 ]
disp_op	string	\ge
a2	integer	11
operations2	list	List of 2 items
values2	list	[ 11, -11, 15, 14 ]
disp_values2	list	[ 11, -11 ]
disp_op2	string	\lt

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(1..15)

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`

→ Used by:

values

Parts

Part a) True/False
1. Alt Unnamed alternative
Part b) True/False

True/False

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

Is the following statement true or false?

$\var{disp_values[0]}\var{disp_op}\var{disp_values[1]}$

Help with this part type

Marks

Show correct answer on reveal?

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Is the answer "True"

$\operatorname{eval} \left ( \operatorname{expression} \left ( \texttt{disp_values} \left[0\right] + \textbf{If} \; \left ( \texttt{disp_op} = \textrm{\gt} \right ) \; \textbf{then} \; \textrm{>} \; \textbf{else} \; \textrm{>=} + \texttt{disp_values} \left[1\right] \right ) \right )$

Advice

The symbol is a comparitor that $<$ says that the object to its left is less than the object to its right. Similarly, $>$ says the object to its left is greater than the object to its right.

In each case the sentence can be read in two ways e.g. $a<b$ can be read as "$a$ is less than $b$" OR "$b$ is greater than $a$".

The symbol $\leq$ just changes the sentence to include "...or equal to...". This can be of particular relevance when dealing with integers (whole numbers) e.g. $x \geq 4$ and $x$ is a whole number means that $x$ could be $4, 5, 6,$ or $7$ and so on. Whereas, $x>4$ and $x$ is a whole number means that $x$ could be $5,6,$... etc. Notably in the second case $x$ cannot be $4$.

Use this link to find some resources which will help you revise this topic.

Give a worked solution to the whole question.

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

Part	Test	Passed?
True/False
True/False		Hasn't run yet
True/False
True/False		Hasn't run yet
True/False
True/False		Hasn't run yet

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NB1 - Inequalities (understanding notation)

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Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Checkpoint description

Will Morgan 1 year ago

Will Morgan 1 year, 1 month ago

Will Morgan 1 year, 1 month ago

Andrew Neate 1 year, 2 months ago

Andrew Neate 1 year, 2 months ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

True/False

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Error

NB1 - Inequalities (understanding notation)

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

Will Morgan 1 year ago

Will Morgan 1 year, 1 month ago

Will Morgan 1 year, 1 month ago

Andrew Neate 1 year, 2 months ago

Andrew Neate 1 year, 2 months ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

True/False

Generated value: `integer`