My worldly knowledge is extremely limited and of course, I know nothing. That being said, I'll try to answer your next question.
I wonder why most of my questions are answered by mostly same people? I mean that's good but why other don't tend to answer much?
If you tend to ask about certain subjects that only a few have knowledge of - math or science are two I can think of off-hand that I'm not well versed in - then you will have a limited number of folks that have the correct answer and how they arrived at that answer.
If they are poll questions - what's your favorite color type of thing - then you'll have more people join in the fun. So, it really depends on what you're asking about on who will be able to answer.
You had some math questions that us old folks are out of practice. But we do try to help so keep asking questions
I think you'll find that most people will answer questions that they have knowledge about . Some of us will try and help with links to other sites to help you. Also depends on the time of day as this site is worldwide. So many different time zones. Then you have to remember that some people are just shy ! LOL