# Did i do this k-map right?

1. Sep 24, 2005

### mr_coffee

Hello everyone, here is my k-map of the truth table for prime numbers, if its a prime number it should output 1. I have the truth table and k-map in this picture:
http://img226.imageshack.us/img226/568/jiji4uh.jpg [Broken]
Thanks.

Last edited by a moderator: May 2, 2017
2. Sep 24, 2005

### Janus

Staff Emeritus
There is a problem with the third term of your answer.

3. Sep 24, 2005

### Kenneth Mann

I can't read your figure.

KM

4. Sep 24, 2005

### mr_coffee

sorry here is the picture bigger!! i don't see how my third term is wrong? http://img132.imageshack.us/img132/9960/lastscan2rz.jpg [Broken]

Last edited by a moderator: May 2, 2017
5. Sep 24, 2005

### Janus

Staff Emeritus
you looped ABCD and ABCD, so how did you end up with ABCD?

Last edited by a moderator: May 2, 2017
6. Sep 24, 2005

### mr_coffee

hm....I only looped A'B & CD so i got A'BCD

7. Sep 24, 2005

### mr_coffee

ohhh i see where i ****ed up, sorry! my friend pointed it out also! too much coffee or somthing. :)

8. Sep 26, 2005

### Dude

reply

Hello Mr Coffe...........i find some mistake in the third term......it would be B'CD but not AB'CD...........

Last edited by a moderator: May 2, 2017
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