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#1 hhjkkh20  Icon User is offline

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Does this question really require such a long truth table?

Posted 29 April 2017 - 04:38 PM

I started doing the table but i realised there would be a tonne of different possibilities, a stupid amount that makes me feel like i dont understand the question. Before you say, i understand that its only 3 numbers of each 4 bit binary number. Thanks for the help in advance :)

Here is the question:

A group of three binary inputs is used to represent the values 0 7. For each of the values 2, 5 or 7 the output will be TRUE, otherwise the output will be false.

Construct the truth table.



Here is the link to the table i have started.

https://docs.google....dit?usp=sharing

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Replies To: Does this question really require such a long truth table?

#2 jon.kiparsky  Icon User is offline

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Re: Does this question really require such a long truth table?

Posted 29 April 2017 - 05:53 PM

Please post the table as text (preferably using the [code] tags or a monospaced font for readability)
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#3 r.stiltskin  Icon User is offline

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Re: Does this question really require such a long truth table?

Posted 29 April 2017 - 06:24 PM

View Posthhjkkh20, on 29 April 2017 - 07:38 PM, said:

Before you say, i understand that its only 3 numbers of each 4 bit binary number.

Why "4 bit" binary number? You only need 3 bits to represent 0-7, so why would you need any more than that in the truth table?
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#4 sepp2k  Icon User is offline

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Re: Does this question really require such a long truth table?

Posted 30 April 2017 - 06:00 AM

View Posthhjkkh20, on 30 April 2017 - 01:38 AM, said:

A group of three binary inputs is used to represent the values 0 7.


This doesn't mean that you have three numbers between 0 and 7. It means you have three bits ("binary inputs") that make up a single number between 0 and 7.
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