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GeneralA foolish mistake Pin
Cp-Coder17-Aug-20 9:40
Cp-Coder17-Aug-20 9:40 
GeneralRe: A foolish mistake Pin
Johnny J.17-Aug-20 10:02
professionalJohnny J.17-Aug-20 10:02 
GeneralRe: A foolish mistake Pin
Cp-Coder17-Aug-20 10:06
Cp-Coder17-Aug-20 10:06 
JokeRe: A foolish mistake Pin
honey the codewitch17-Aug-20 11:20
mvahoney the codewitch17-Aug-20 11:20 
GeneralRe: A foolish mistake Pin
obermd18-Aug-20 3:29
obermd18-Aug-20 3:29 
GeneralRe: A foolish mistake Pin
Dan Neely18-Aug-20 3:50
Dan Neely18-Aug-20 3:50 
GeneralRe: A foolish mistake Pin
BotReject26-Aug-20 23:48
BotReject26-Aug-20 23:48 
GeneralMental arithmetic Pin
Jörgen Andersson17-Aug-20 7:28
professionalJörgen Andersson17-Aug-20 7:28 
There's an artwork by Nikolay Bogdanov-Belsky called Mental Arithmetic. In the Public School of S.Rachinsky, 1895 - Nikolay Bogdanov-Belsky - WikiArt.org[^]

The interesting part is the task on the blackboard.
(102 + 112 + 122 + 132 + 142)/365

Like the Russian boys, you have no calculator and no paper. Upvotes for:
1. A good reasoned guess at the answer
2. The exact answer, with an explanation of how you got it by mental arithmetic.

<edit> I should have expected you to brute force it in your heads. (You did do it without paper or calculator, right?)
So from now on I will upvote elegant solutions!</edit>
Wrong is evil and must be defeated. - Jeff Ello
Never stop dreaming - Freddie Kruger


modified 17-Aug-20 15:55pm.

GeneralRe: Mental arithmetic Pin
PIEBALDconsult17-Aug-20 7:53
mvePIEBALDconsult17-Aug-20 7:53 
GeneralRe: Mental arithmetic Pin
W Balboos, GHB17-Aug-20 7:56
W Balboos, GHB17-Aug-20 7:56 
GeneralRe: Mental arithmetic Pin
MarkTJohnson17-Aug-20 8:25
professionalMarkTJohnson17-Aug-20 8:25 
GeneralRe: Mental arithmetic Pin
Jörgen Andersson17-Aug-20 9:56
professionalJörgen Andersson17-Aug-20 9:56 
GeneralRe: Mental arithmetic Pin
James McCullough17-Aug-20 11:40
professionalJames McCullough17-Aug-20 11:40 
GeneralRe: Mental arithmetic Pin
Frank Malcolm17-Aug-20 21:36
Frank Malcolm17-Aug-20 21:36 
GeneralRe: Mental arithmetic Pin
Davyd McColl17-Aug-20 21:57
Davyd McColl17-Aug-20 21:57 
GeneralRe: Mental arithmetic Pin
jsc4217-Aug-20 23:34
professionaljsc4217-Aug-20 23:34 
GeneralRe: Mental arithmetic Pin
W Balboos, GHB18-Aug-20 1:36
W Balboos, GHB18-Aug-20 1:36 
GeneralRe: Mental arithmetic Pin
Rick York17-Aug-20 8:02
mveRick York17-Aug-20 8:02 
GeneralRe: Mental arithmetic Pin
Jörgen Andersson17-Aug-20 8:05
professionalJörgen Andersson17-Aug-20 8:05 
GeneralRe: Mental arithmetic Pin
OriginalGriff17-Aug-20 8:08
mveOriginalGriff17-Aug-20 8:08 
GeneralRe: Mental arithmetic Pin
pkfox17-Aug-20 8:51
professionalpkfox17-Aug-20 8:51 
GeneralRe: Mental arithmetic Pin
Jon McKee17-Aug-20 9:23
professionalJon McKee17-Aug-20 9:23 
GeneralRe: Mental arithmetic Pin
Nelek17-Aug-20 19:44
protectorNelek17-Aug-20 19:44 
GeneralRe: Mental arithmetic Pin
kmoorevs17-Aug-20 10:32
kmoorevs17-Aug-20 10:32 
GeneralRe: Mental arithmetic Pin
Joop Eggen17-Aug-20 20:25
Joop Eggen17-Aug-20 20:25 

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