Recent content by Carpenter T

Or: Just plain fun:) Isn't this suppose to be a math forum? Am I the only one here who would find satisfaction in knowing I could do this stuff in my head? I'm only 29, but you guys are already making me feel old. Besides, with all the competition in carpentry, for a carpenter this kind...

"Quick Calculations" by Shi Fengshou in English? I'm looking for an English manual to "Shi Fengshou Rapid Calculations." Apparently the guy wrote a book in Chinese sometime between 1970 and 1980 called "Quick Calculations." However, I haven't been able to find an English translation of it. I...

Thanks for the reply. That makes sense; I think doing that will help a little bit.

Many carpenters have either seen or heard of someone who could calculate rafter lengths in their head. Perhaps these people are just gifted number crunchers, but I want to crack the mystery behind it. That's why I’m calling on you mathematical geniuses for help. Are there any tricks to...