Melody

@@ End of Day Wrap     Thurs  15/1/15     Sydney, Australia      Time 12:55am    (Really Fri)   ♪ ♫

 

Hello everyone,

Lots of fabulous answers today from Heureka, CPhill, Rampager1998, diamond, all-them-marvel-feels, Alan, Rosala, Cairo, Geno3141, Mathew120 and yllen.  A great big thank you to each of you.  I hope I didn't forget anyone. 

 

I stumbled  upon some really interesting maths clips today.  You might like to take a look.  

https://www.youtube.com/results?search_query=Numberphile+website

I have added this to our "reference material" Sticky topic.    

 

Interest Posts:

 

1)  This one provided some entertainment.          Thanks Rosala and Chris  

http://web2.0calc.com/questions/are-you-seeking-unanswered-questions

2) Using logs in investments      Thanks Geno

 http://web2.0calc.com/questions/use-logarithms-to-solve-the-problem-how-long-will-it-take-an-investment-of-2000-to-triple-if-the-investment-earns-interest-at-the-rate-of

3) Weight and volume :  For everyone !     Geno, anon and Melody 

http://web2.0calc.com/questions/1-kg-is-equal-to-how-many-liter

4) What is the biggest prime number.   The clip is entertaining.       Geno and Melody

http://web2.0calc.com/questions/all-prime-numbers_1

5) Finding height of a right triangle.  Thanks Rampager, Heureka and Alan

http://web2.0calc.com/questions/height-of-a-right-triangle-without-area

6) Number Pattern.       Thanks Chris and Heureka     

http://web2.0calc.com/questions/whats-the-pattern-for-1-3-9-81-243

7) This looks interesting. Reflection, rotation and vectors    Thanks Heureka and Geno    

http://web2.0calc.com/questions/isa-b-perpendicular-to-ab-explain-your-answer

8)  Why is 0!=1    

This includes a really interesting video clip, it explains factorial and the gamma function.    Melody

http://web2.0calc.com/questions/why-is-0-equal-to-1

 

                   ♫♪  ♪ ♫                                ♬ ♬ MELODY ♬ ♬                                 ♫♪  ♪ ♫

Fri 15/1/15

I constantly see people change mixed numeral into improper fractions for addition and subtraction and it is just not necessary.  Tetration, you have done a nice, very well presented answer here and I thank you but I would really like you and others to take a proper look at my answer.   It is always good to examine new techniques.  I get excited when I see and learn better methods to solve or teach an old problem.

http://web2.0calc.com/questions/what-is-9-3-and-1-3

 

1) Melody in silly mode

http://web2.0calc.com/questions/if-bob-has-two-apples-and-grace-has-three-pies-how-many-elephants-can-jumps-over-the-moon

2) Find the whole when given a percentage.  Thanks Tetration.

http://web2.0calc.com/questions/154-employees-is-7-of-what-employees

3) How long has mathematics been taught in classrooms?  Thanks Geno

http://web2.0calc.com/questions/what-was-the-first-school-to-teach-math

4) Graphical Interpretaion of proportionality.   Thanks CPhill

http://web2.0calc.com/questions/help-please-math-problem

5) I had another crack at presenting long division with LaTex.  

Heureka and I have tried this a few different ways.   Heureka's last attempt was better.     

http://web2.0calc.com/questions/how-do-u-do-92-divide-6-3-in-long-division-nbsp

6) A great probability logic exercise. Great answer from Heureka, good questioning by Rosala.  Thanks 

http://web2.0calc.com/questions/my-uncle-wrote-three-different-letters-and-addressed-three-envelopes-then-he-went-outside-for-a-walk-while-he-was-out-his-little-daughter

                   ♫♪  ♪ ♫                                ♬ ♬ MELODY ♬ ♬                                 ♫♪  ♪ ♫