Modular Arithmetic: time

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Daniel Mansfield 6 years, 2 months ago

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Daniel Mansfield 6 years, 2 months ago

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Question statement

The concept of modular arithmetic is already familiar from everyday life.

Give any introductory information the student needs.

			Name	Type	Generated Value

hours24	list	List of 24 items
hours12	list	List of 12 items
start	integer	18
duration	integer	7
ansA	list	List of 24 items
ansB	list	List of 12 items
startb	integer	7
ansC	list	List of 24 items
c	integer	9

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
["01:00","02:00","03:00","04:00","05:00","06:00","07:00","08:00","09:00","10:00","11:00","12:00","13:00","14:00","15:00","16:00","17:00","18:00","19:00","20:00","21:00","22:00","23:00","00:00"]

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Description

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

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Generated value: `list`

[ "01:00", "02:00", "03:00", "04:00", "05:00", "06:00", "07:00", "08:00", "09:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00", "17:00", "18:00", "19:00", "20:00", "21:00", "22:00", "23:00", "00:00" ]

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"Part a)" - prompt
"Part a)" - List of choices
"Part c)" - List of choices

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

If you go to bed at $\var{hours24[start]}$ and sleep for $\var{duration}$ hours, at what time will you wake up? Give your answer in 24-hour format.

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Advice

a. In 24 hour time: {hours24[start]} + {duration}:00 = {start+duration+1}:00 = {hours24[mod(start+duration,24)]}

b. In 12 hour time {hours12[startb]} + {duration}:00 = {startb+duration+1}:00 = {hours12[mod(startb+duration,12)]}

c. A time of {hours12[c]} in 12-hour format could mean {hours24[c]} or {hours24[c+12]} in 24-hour format.

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Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Daniel Mansfield 6 years, 2 months ago

Daniel Mansfield 6 years, 2 months ago

Error in variable testing condition

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Generated value: `list`

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Modular Arithmetic: time

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Daniel Mansfield 6 years, 2 months ago

Daniel Mansfield 6 years, 2 months ago

Error in variable testing condition

Error

Warning

Generated value: list

Parts

Choose one from a list

Advanced settings

Generated value: `list`