December 04, 2012

Tips for Digital Design/Digital Electronics Exams

14:58 Posted by DurgaSwaroop No comments


  1. Don't worry if you didn't attend all the lectures.[I'm sure you will not understand anything anyway :)]
  2. Try not to read from the lecture slides (from experience)
  3. Better to read from the text book itself.It explains many concepts (because your lecturer can't and that is why you are reading this article!!)
  4. Better to start reading from at least a week before the finals if u plan to do it from text book
  5. Start from the middle of the book(that is from where the important things start.You won't be asked about bits and bytes in the exam anyway)

December 02, 2012


12:11 Posted by DurgaSwaroop 1 comment

           GAME OF FOUR FOURS 

The rules of the game are very simple.You just have to use '4' four times and have to construct the integers 0,1,2,3..... , etc

The valid Operations one can use are
  • You can surely use the four fundamental operations of mathematics (+,-,X,/)
  • Concatenation is valid (44,444 are perfectly fine)
  • Powers can be used (4^4 is perfectly sound)
  • You can use square roots  ( √ )
  • You can use the factorial operation  (4! = 4 X 3 X 2 X 1 = 24)
  • You can use the decimal form also ( .4 is valid)

November 29, 2012

The Life Story Of PI

03:41 Posted by DurgaSwaroop No comments

                                     STORY OF PI (π)

                          Pi (π)  is defined as the ratio of the circumference of a circle to its diameter. There is no such thing as its exact value because it is a non-terminating non-recurring decimal number,which when simply put means that its value has no end. It is also referred as a TRANSCENDENTAL NUMBER, and more importantly it is an irrational number(like √2 ,√3 ...).

                          The decimal representation of pi(π) has an approximate value of 3.14,which we take normally  for many calculations in general math. 
                           The first 100 significant figures of  π are 
              π = 3.14159265358979323846264338327950288419716939937510582097 
4944592307816406286208998628034825342117067... ... (the laundry list continues forever)
                            The fractions 22/7, 355/113 approximate to its value(but still not exact).
                      355/113  = 3.14159292  (accurate up to six digits)
                      22/7 = 3.142857143 (accurate only up to two places)
For general purpose calculations 22/7 is taken as  π  [close but not close enough :-)]
Now are your ready for something amazing ????

The value of  π to 1,00,000 significant figures is.............................

November 14, 2012

November 10, 2012

October 29, 2012

October 28, 2012