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GeneralRe: Somehow William Shatner in space finally, it seems right. Pin
den2k8813-Oct-21 4:39
professionalden2k8813-Oct-21 4:39 
GeneralRe: Somehow William Shatner in space finally, it seems right. Pin
PIEBALDconsult13-Oct-21 4:44
mvePIEBALDconsult13-Oct-21 4:44 
GeneralRe: Somehow William Shatner in space finally, it seems right. Pin
  Forogar  13-Oct-21 5:34
professional  Forogar  13-Oct-21 5:34 
GeneralRe: Somehow William Shatner in space finally, it seems right. Pin
Richard Andrew x6413-Oct-21 5:36
professionalRichard Andrew x6413-Oct-21 5:36 
GeneralRe: Somehow William Shatner in space finally, it seems right. Pin
fgs196313-Oct-21 10:14
fgs196313-Oct-21 10:14 
GeneralRe: Somehow William Shatner in space finally, it seems right. Pin
Mike Hankey13-Oct-21 10:43
mveMike Hankey13-Oct-21 10:43 
GeneralRe: Somehow William Shatner in space finally, it seems right. Pin
willichan14-Oct-21 7:29
professionalwillichan14-Oct-21 7:29 
GeneralFour fours Pin
Amarnath S13-Oct-21 2:21
professionalAmarnath S13-Oct-21 2:21 
I teach high school maths to a child, and yesterday, there was some spare time as it was raining outside, and he could not head back home. So, I opened my old book of math puzzles and gave him some puzzles. One puzzle is quite interesting, and is said to have occupied an acquaintance over a two-and-a-half hour train journey from Mysore to Bangalore, two cities in Southern part of India separated by about 150 km. The puzzle goes like this:

Four Fours
Express any number between 1 and 100 in terms of four 4s, and mathematical symbols, + - x / . .4-dot ! sqrt, etc.
For example,
1 = (4 + 4)/(4 + 4)
4 = 4 / sqrt(4) + 4 / sqrt(4)
12 = (4!/4) + (4!/4)
36 = (4!/4) x (4!/4)
45 = 44 + 4/4
100 = (4/.4) x (4/.4)

Can you attempt to fill in the other numbers from 1 to 100. Some numbers have non-unique solutions.

One challenge here is to find HTML symbols to express the numbers. For example, .444444... is expressed as .4-dot (with the dot on top) - so this fraction 4/9 is expressed as .4-dot, with only one 4 being used. Also, expressing square root needs a unicode symbol in HTML.
GeneralRe: Four fours Pin
Nagy Vilmos13-Oct-21 2:56
professionalNagy Vilmos13-Oct-21 2:56 
GeneralRe: Four fours Pin
BillWoodruff13-Oct-21 3:03
professionalBillWoodruff13-Oct-21 3:03 
GeneralRe: Four fours Pin
Greg Utas13-Oct-21 3:53
professionalGreg Utas13-Oct-21 3:53 
GeneralRe: Four fours Pin
Vikram A Punathambekar13-Oct-21 4:23
Vikram A Punathambekar13-Oct-21 4:23 
GeneralRe: Four fours Pin
Richard MacCutchan13-Oct-21 5:29
mveRichard MacCutchan13-Oct-21 5:29 
GeneralRe: Four fours Pin
Amarnath S13-Oct-21 4:23
professionalAmarnath S13-Oct-21 4:23 
GeneralRe: Four fours Pin
B Alex Robinson15-Oct-21 9:11
B Alex Robinson15-Oct-21 9:11 
GeneralRe: Four fours Pin
Richard Deeming13-Oct-21 4:12
mveRichard Deeming13-Oct-21 4:12 
GeneralRe: Four fours Pin
Amarnath S13-Oct-21 4:23
professionalAmarnath S13-Oct-21 4:23 
GeneralRe: Four fours Pin
jmaida13-Oct-21 11:19
jmaida13-Oct-21 11:19 
GeneralRe: Four fours Pin
Amarnath S13-Oct-21 14:41
professionalAmarnath S13-Oct-21 14:41 
GeneralRe: Four fours Pin
jmaida13-Oct-21 15:05
jmaida13-Oct-21 15:05 
GeneralRe: Four fours Pin
mdblack9814-Oct-21 3:42
mdblack9814-Oct-21 3:42 
GeneralRe: Four fours Pin
Amarnath S14-Oct-21 4:06
professionalAmarnath S14-Oct-21 4:06 
GeneralRe: Four fours Pin
Harald M.19-Oct-21 23:34
Harald M.19-Oct-21 23:34 
GeneralRe: Four fours Pin
mdblack9820-Oct-21 2:46
mdblack9820-Oct-21 2:46 
GeneralRe: Four fours Pin
Harald M.20-Oct-21 3:51
Harald M.20-Oct-21 3:51 

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Straw Poll

Were you affected by the geomagnetic storms this past weekend?
Communication disruptions, electrified pipes, random unexplained blue-screens in Windows - the list of effects is terrifying.
  Results   496 votes