AI Assistant
Forums
Land Surveying & re...
Software, CAD & Map...
The "simple" math w...
 
Notifications
Clear all

The "simple" math we used to know how to do in our heads

    Summarize Topic
Software, CAD & Mapping
Last Post by holy-cow 10 months ago
5 Posts
4 Users
2 Reactions
2,232 Views
RSS
holy-cow
 holy-cow
(@holy-cow)
Posts: 25683
Member
Topic starter
Translate ▼
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Try this one on for size.

Attachment : 533088692_24030777636592842_6983079063171515037_n.jpg

Here's another simple one.

Attachment : 532265390_753063201025092_3597649648804713845_n.jpg

One more.

Attachment : 518353420_1121676483395798_2343939065951966476_n.jpg

Don't choke on this one.

Attachment : 532382856_757708873889797_7885052145440029473_n.jpg

 
Posted : August 20, 2025 11:04 am
1
BStrand
 BStrand
(@bstrand)
Posts: 2744
Member
Translate ▼
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

The bottom one isn't bad but I don't know if I ever learned to do the top one in my head.  If I did I must have forgot.


 
Posted : August 20, 2025 11:21 am
bill93
 bill93
(@bill93)
Posts: 9977
Member
Translate ▼
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

1. Estimated x=2.48

2. 20

3. x=0 is only solution

4. X=3

Calculator says first one is 2.453...


 
Posted : August 20, 2025 12:06 pm
mathteacher
 mathteacher
(@mathteacher)
Posts: 2244
Member
Translate ▼
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

If the right side was 32, x would be 2 1/2.


 
Posted : August 20, 2025 3:16 pm
holy-cow
 holy-cow
(@holy-cow)
Posts: 25683
Member
Topic starter
Translate ▼
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Those were the days.............................

Attachment : 535355430_748862337922784_3311753298422065694_n.jpg

 
Posted : August 20, 2025 4:42 pm
1

Forum Jump:
  Previous Topic
Next Topic  
Share:
Share
Tweet
Share
Share