James's copy of Numerical reasoning - ratio recipe

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Ready to use

5 years, 6 months ago

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James McEvoy 5 years, 6 months ago

Gave some feedback: Ready to use

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James McEvoy 8 years, 6 months ago

Created this as a copy of Numerical reasoning - ratio recipe.

Name	Status	Author	Last Modified
Numerical reasoning - ratio recipe	Ready to use	Christian Lawson-Perfect	01/06/2016 11:12
Numerical reasoning - ratio recipe	draft	steve kilgallon	18/07/2016 11:46
James's copy of Numerical reasoning - ratio recipe	Ready to use	James McEvoy	10/09/2019 13:40
Kinga's copy of James's copy of Numerical reasoning - ratio recipe	draft	Kinga Zaczek	22/09/2017 16:54

There are 3 other versions that do you not have access to.

Question statement

A certain preparation consists of liquids $x$ , $y$ and $z$ in the proportion {ratios[0]}:{ratios[1]}:{ratios[2]}.

Give any introductory information the student needs.

			Name	Type	Generated Value

u	list	[ 18, 30, 16 ]
lots	integer	4
ratios	list	[ 3, 5, 4 ]
units	string	litres
rawratios	list	[ 3, 5, 4 ]
ratiototal	number	12
amount	number	48
uv	vector	vector(18,30,16)
rv	vector	vector(3,5,4)
rgcd	number	1

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
//amount of each liquid
    map(random(3..10)*ratios[j],j,0..2)

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: `list`

[ 18, 30, 16 ]

← Depends on:

ratios

→ Used by:

lots
uv

Advice
"Unnamed part" - prompt

Parts

Gap-fill
1. Gap Number entry
  Add

Gap-fill

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

How many {units} of the preparation can be made from a stock of materials consisting of {u[0]} {units} of $x$, {u[1]} {units} of $y$, and {u[2]} {units} of $z$?

Unnamed gap {units}

Advice

The proportions {ratios[0]}:{ratios[1]}:{ratios[2]} have to be preserved.

So if we use $\simplify{{ratios[0]}*U}$ {units} of $x$ then we must use $\simplify{{ratios[1]}*U}$ {units} of $y$ and $\simplify{{ratios[2]}*U}$ {units} of $z$, to get $\var{ratiototal}U$ {units} of the preparation.

We would like $U$ to be as big as possible.

As we have $\var{u[0]}$ {units} of $x$, {describesol(0)}

As we have $\var{u[1]}$ {units} of $y$, {describesol(1)}

As we have $\var{u[2]}$ {units} of $z$, {describesol(2)}

So the maximum value of $U$ is $\var{lots}$ and we can make $\var{lots} \times \var{ratiototal} = \var{amount}$ {units} of the preparation.

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
Number entry
Number entry		Hasn't run yet

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James's copy of Numerical reasoning - ratio recipe

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Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Checkpoint description

James McEvoy 5 years, 6 months ago

James McEvoy 8 years, 6 months ago

Error in variable testing condition

Error

Warning

Generated value: `list`

Parts

Gap-fill

Loading...

Error

James's copy of Numerical reasoning - ratio recipe

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

James McEvoy 5 years, 6 months ago

James McEvoy 8 years, 6 months ago

Error in variable testing condition

Error

Warning

Generated value: list

Parts

Gap-fill

Generated value: `list`