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Notices by СтаЛьг (staleg@loadaverage.org)

СтаЛьг (staleg@loadaverage.org)'s status on Sunday, 29-Apr-2018 19:06:37 UTC СтаЛьг
in reply to
- Ute Hauth
@miradlo since that, it equals to a²+b(2a+b) (the core formula for manual sqrt method, if anyone remembers it).
…
Moreover, if the first number can be assigned as 10a, and b=5, we'd got:
(10a+b)² = 100a²+20a•5+25=100a(a+1)+25.
Hence, to square any [two-digit] number ending by 5, you should multiply number of tens with one added with 1, and write 25 after that. So, 75²={7·8=56}= 5625.
…
Enjoy! 😜
#mathhack

In conversation Sunday, 29-Apr-2018 19:06:37 UTC from loadaverage.org permalink
СтаЛьг (staleg@loadaverage.org)'s status on Thursday, 11-Jan-2018 08:41:20 UTC СтаЛьг

It was deeply in the night... #shortwave #meteo #fax
And today I'm on morning-shift work… so sleepy, d-mn! https://loadaverage.org/attachment/3998005
In conversation Thursday, 11-Jan-2018 08:41:20 UTC from loadaverage.org permalink
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СтаЛьг (staleg@loadaverage.org)'s status on Thursday, 02-Nov-2017 19:57:33 UTC СтаЛьг

How my new #bike looks like after repairs https://loadaverage.org/attachment/3849788
In conversation Thursday, 02-Nov-2017 19:57:33 UTC from loadaverage.org permalink
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