You are not logged in.
#1 2012-12-20 04:04:16
- RadioBoy
- Novice
Offline
Hello! This Is RadioBoy
Hello, I have just joined the math is fun forum. I expect interesting things here and will also share my experience of math. For example, the miracle of digit 9. The product of digit nine in interaction with itself will always be nine (9 x 9 = 18 = 1+8 =9).
If you are thinking of switching or using alternative energy in your home, solar power is the best choice that can sustain your lifestyle.
#2 2012-12-20 04:40:06
- anonimnystefy
- Real Member
Offline
Re: Hello! This Is RadioBoy
Hi RadioBoy
Welcone to the forum! 
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón
#3 2012-12-20 05:49:47
- bobbym
- Administrator
Offline
Re: Hello! This Is RadioBoy
Hi RadioBoy;
Welcome to the forum.
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#4 2012-12-20 17:19:52
- ganesh
- Moderator
Offline
Re: Hello! This Is RadioBoy
Hi RadioBoy,
Welcome to the forum!
Character is who you are when no one is looking.
#5 2012-12-21 12:13:01
- MathsIsFun
- Administrator
Offline
Re: Hello! This Is RadioBoy
Welcome!
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
#6 2012-12-26 18:38:51
- julianthemath
- Super Member
Offline
Re: Hello! This Is RadioBoy
Belated welcome to the forum, RadioBoy!
Star members have too many stars. So, if I congratulate new star members, so, that means I need more stars for my picture?
#7 2012-12-26 19:56:07
- bob bundy
- Moderator
Offline
Re: Hello! This Is RadioBoy
hi RadioBoy,
Welcome to the forum.
For example, the miracle of digit 9. The product of digit nine in interaction with itself will always be nine (9 x 9 = 18 = 1+8 =9).
or a number that reduces to nine eg. 109739369 x 9 = 987654321 ....9+8+7+6+5+4+3+2+1= 45 ... 4+5 = 9.
So here's a challenge:
Why does this happen?
Why doesn't it happen for, say, 7?
What other numbers does it happen for?
Bob
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei