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HP Forum Archive 19

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Happy square root of 10 day!
Message #1 Posted by Gene Wright on 16 Mar 2010, 9:11 a.m.

I did not think PI should have all the fun. :-)

      
Re: Happy square root of 10 day!
Message #2 Posted by Maximilian Hohmann on 16 Mar 2010, 9:49 a.m.,
in response to message #1 by Gene Wright

Quote:
I did not think PI should have all the fun. :-)

And why does no one think about us europeans? We get no fun at all, the way we write our dates :-(

            
Re: Happy square root of 10 day!
Message #3 Posted by Egan Ford on 16 Mar 2010, 10:10 a.m.,
in response to message #2 by Maximilian Hohmann

Your Pi day will come (22/7).

      
Re: Happy square root of 10 day!
Message #4 Posted by Namir on 16 Mar 2010, 10:04 a.m.,
in response to message #1 by Gene Wright

I remember noticing how close pi and the square of 10 were when I was playing with simple approximations for pi!

I bet you are now more aware of these things after visiting locations in Greece where old Greek mathematicians lived.

Namir

Edited: 16 Mar 2010, 10:06 a.m.

            
Re: Happy square root of 10 day!
Message #5 Posted by Crawl on 16 Mar 2010, 10:12 a.m.,
in response to message #4 by Namir

Supposedly, Plato suspected that pi was exactly equal to the sum of the square root of 3 and the square root of 2.

      
Re: Happy square root of 10 day!
Message #6 Posted by Massimo Gnerucci (Italy) on 16 Mar 2010, 10:48 a.m.,
in response to message #1 by Gene Wright

Thank you! Since today is my birthday too... and, finally, someone pointed out *my* approximation :-D

Greetings,
Massimo

      
Re: Happy square root of 10 day!
Message #7 Posted by Palmer O. Hanson, Jr. on 16 Mar 2010, 9:15 p.m.,
in response to message #1 by Gene Wright

Gene:

I am fairly sure that some slide rules were made with the CF scales folded at the square root of ten rather than at pi.

I am away from my files for a few days. I will try to verify it next week.

Palmer

            
Re: Happy square root of 10 day!
Message #8 Posted by Steve Keeley on 17 Mar 2010, 2:29 a.m.,
in response to message #7 by Palmer O. Hanson, Jr.

You are correct. I have a Hemmi 250 with the CF and DF scales folded at sqare root of ten.

                  
Re: Happy square root of 10 day!
Message #9 Posted by Martin Pinckney on 17 Mar 2010, 8:25 a.m.,
in response to message #8 by Steve Keeley

Quote:
I have a Hemmi 250 with the CF and DF scales folded at square root of ten.
Interesting. My Posts (made by Hemmi) are folded at Pi.
      
Re: Happy square root of 10 day!
Message #10 Posted by C.Ret on 17 Mar 2010, 7:03 a.m.,
in response to message #1 by Gene Wright

Hey, guys !

We still have to wait 12 years before the really true square of 10 day !

3.16.22 March, 16th of 2022 ?

Or two and nearly two an a halb centuries for the high precision 10 SQR day : 3.16 2278


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