#396**+8 **

@@ End of Day Wrap Sat 10 /1/15 Sydney, Australia Time 4:30pm â™ª â™«

Hi everyone,

Today our great answerers were Tetration, CPhill, Heureka, geno3141, happy7, Shaniab29544 Alan and Rosala. Thanks everyone.

I think there are some chemistry and physics questions left to answer - if anyone wants to have a go.

Interest posts:

1) Limit. Melody

http://web2.0calc.com/questions/calculus-of-a-limit

2) A Heureka Special. Thanks reinout (for providing question) and Heureka

http://web2.0calc.com/questions/equation_19

3) This inverse function one gave me and Chris a headache. LOL

http://web2.0calc.com/questions/please-help_65

â™«â™ª â™ª â™« â™¬ â™¬ MELODY â™¬ â™¬ â™«â™ª â™ª â™«

Melody
Jan 10, 2015

#207**0 **

Sun 11/01/14

1) Prove $${\sqrt{{\mathtt{10}}}}$$ is irrational. Melody

http://web2.0calc.com/questions/is-the-square-root-of-ten-rational-or-irrational

2) There is more than 1 way to solve an equation. Thanks Melody and Tetration

http://web2.0calc.com/questions/x-2-x-4-5-6-0

3) Again 2 ways to solve one equation Thanks Chris and Alan.

http://web2.0calc.com/questions/if-x-0-what-is-the-solution-to-the-following-equation-1-x-x-2-7-x

4) Double factorial - a new one for me. Thanks Tetration.

http://web2.0calc.com/questions/using-only-for-4s-and-any-symbol-how-can-you-make-10#r6

â™«â™ª â™ª â™« â™¬ â™¬ MELODY â™¬ â™¬ â™«â™ª â™ª â™«

Melody
Jan 10, 2015

#1**+13 **

* Every* perfect number found, so far, is even.....the better question is....."Are there any odd perfect numbers??".....it is speculated that there aren't.......but it hasn't been proved ...!!!

[ BTW...for those that don't know...a perfect number is one that equals the sum its proper divisors...6 is the first one and 28 is the next ]

This topic is quite fascinating.....you can read more about perfect numbers here...http://www-history.mcs.st-and.ac.uk/HistTopics/Perfect_numbers.html

CPhill
Jan 10, 2015