relationship of 7 with gk

Relationship of 7 With Computer sciences.

Monday, September 7th, 2009

1. According to the AMAR UJALA newspaper (dated-30-12-2007), Google companies’ googleplex,(estd.1997); first office was got established in a small garage. After the starting of the company, there remained only 7 workers for a period of  various months. 
2. In 2002,There were 7 examinations ( 5 core & 2 electives ) in the new track of M.C.S.E. based on an operating system M.S.Windows-2000 .
3. 7 is the highest number in octadecimal number system used in computers.
4. A.S.C.I.I. is a 7 bit code used extensively for printers & terminals of the small computer systems . Sometimes an eight bit either 1 or 0 is also added or used as a PARITY BIT.
5. In COBOL (ome of the programming languages ) column no.7 of the screen is used as a Continuation Indicator or Remarks Indicator & entry 77 is used in working storage section of  Data Division.
6. The typical access time ratio between cache & main memory is about 1 to 7 e.g. a typical cache memory may have an access time of 100ns, while main memory’s  access time may be 700ns.
7. The typical access time ratio between cache & auxiliary memory is about 1 to 7000 i.e. Auxiliary memory’s average access time is usually 7000 times that of the cache memory.

REFERENCES—————————————————-
1-Mano,M.Morris,’Computer System Architecture’,New Delhi,Prentice -Hall of  India Private Limited,April,2002 ( Third Edition ), 525pp
2-Roy, M.K. & D.Ghosh Dastider, ‘Cobol Programming’, New Delhi, Tata Mcgraw -Hill Publishing Company Limited, 1995, 496pp
writer- SANJEEV KUMAR BANSAL

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1. TANGRAM puzzle is a 7 piece puzzle that can be put together to make hundreds of different shapes & figures. ‘TANS’ is the 7 puzzle pieces of a Tangram puzzle.

2. It is a very surprising fact that you cannot fold any dry paper more than 7 times by folding half at a time.Just try it !……………………………..

3. The prefix “HEPTA” is used widely in maths & science to represent 7.

4. The addition of the numbers on the opposite sides of any original/standard dice (as used in ludo etc..) always gives 7.

5. In the value of Π (pi) upto 255 places of decimal, the occurence of digit 7 is minimum (i.e. only 16 times) as compared with the occurence of other digits in the value of Π.

6. A week have 7 days.

7. ASHTYOG puzzle (see Punjab Kesari newspaper) order is 7χ7.

8. The amount One crore has 7 zeroes against 1.Everyone knows the importance of wining 1 crore rupees in kaun banega crorepati show.

9. Any 6 digit number having first three digits equal to the next three digits will always be divisible by 7 e.g.420420,822822….etc…

10. Any perfect cube number can’t have 7 at it’s unit place.

11. Any perfect square can’t have 7 at it’s unit’s/one’s place but it may have 7 at it’s ten’s place.

12. There are 7 twin primes in between the numbers from 101 to 200.

13. The number of  Partitions of number 5 are 7. or p(5)=7 as   mentioned below.5=4+1=3+2=3+1+1= 2+2+1=2+1+1+1 =1+1+1+1+1

14. The highest known prime number is (2 raise to the power 6,972,593)-1 which has 2,098,960 digits. It was discovered by Nayan Hajraatwala of Plymouth,Michigan,U.S.A. on first june,1999. Here it is worth mentioning that the number of digits  in the power of 2(6972593) of the highest known prime numer is 7.

15. Three series of  Prime Numbers which also forms an A.P.series & all the numbers of the series are ending in 7.         7,37,67,97,127,157.               7,157,307,457,607,757,907          107,137,167,197,227,257           

16.    There are 5  numbers between 1 & 1000 whose sum of digits is 7  & they are also divisible by 7 i.e.  70, 133, 322, 511  &  700.  There are 14 numbers between 1 & 1000 whose sum of digits is a multiple of  7  &  they are also divisible by 7  i.e. 70, 133, 322, 392, 399, 448, 511, 518, 588, 644, 700,  770, 777  & 966. These numbers are also known as HARSHAD NUMBERS. Harshad numbers are those numbers which are divisible by the sum of it’s owndigit.

17. 15873 is the  only AMAZING NUMBER which gives us a six digit number ( having all digits same ) on it’s multiplication by any number from the general table of 7 ( except the last no. i.e. 70 ) as shown . 15873 x  7 =111111 ;15873  x  49= 777777 ………………etc…          

18. There are total 7 NASTY NUMBERS  in between the numbers from 1 to 100 . These  Nasty Numbers are 6, 24, 30, 54, 60, 84 & 96. A Nasty Number is a positive integer having atleast 4 different factors such that the difference between any one pairs of  factors equal the some of another pair of  factors e.g. Possible factors of 6 =1, 2, 3 & 6 . So, the possible pairs , 2+3=6-1

19. 7 is the lowest HAPPY NUMBER . To find out whether a number is HAPPY or not , square it’s digits, add them up & go on doing this until you got 1 or the same number which you have considered. If you get 1  at the end , then the given/considered  number is a Happy Number ,otherwise not. Example-07=0²+7²=49 , 4²+9²=97,  9²+7²=130 , 1²+3²+0²=10 ,  1²+0²=1 . Hence , 7 is a Happy number. 

20. If  we rotate any SUDOKU or MAGIC SQUARE at right angle ( 90°, 180°, 270°, 360° ) by keeping the centre of Sudoku or Magic Square as the central point / pivotal point for rotation ( keep the digits vertical & in the same boxes ) & then on seeing the formed sudoku/magic square in mirror , we can get 7 other similar sudokus /magic squares.

21. By using some numbers or all numbers  in the 7 numbers list  you can add upto 100.  7 numbers are - 1, 2, 4, 8, 16, 32, 37 -Just try it now………………………

22. Prof. Ramashankar Verma , an eminent mathematician of the 20th century passed his intermediate examination in 1923 from the Kayastha Pathshala, Allahabad in the first division & standing 7th in order of merit in the whole of u.p. ( formerly k nown as United Provinces but now Uttar Pradesh )…………………………….©References————————-KAPUR,J.N.,’Some Eminent Mathematicians of the Twentieth Century ‘ ,vol-1 ,M.S.T.S.,Delhi,3rd edition (1994),49 pages, p.no.25. 

    
    Kalpana Chawla,NASA Astronaut
    Kalpana Chawla (March 17, 1962 � February 1, 2003), was an Indian-American scientist and a NASA astronaut. She was one of seven crewmembers killed in the Space Shuttle Columbia disaster.She earned her B.E. degree in aeronautical engineering at Punjab Engineering College in Chandigarh in 1982. Chawla joined the NASA astronaut corps in March 1995 and was selected for her first flight in 1998.
    
    
    
    
    http://en.wikipedia.org/wiki/Seven_Sister_States
    
    http://www.ahasan-sms.blogspot.com/search?updated-max=2009-04-05T00%3A00%3A00%2B08%3A00&max-results=5

On December 3, 1992, an engineer named Neil Papworth sent the very first text messages written "MERRY CHRISTMAS" on it, to his colleague at Vodafone in Great Britain. But after seven years SMS service become very easy to use.
Why did it take so long time? Because for the first 7 years, cell phone users could only send an SMS to his friends or his family using the same operator. It wasn't until 1999 that short messages could be sent between different networks which make a revolution in mobile text messages service.

Liver of a sheep: (1) right lobe, (2) left lobe, (3) caudate lobe, (4) quadrate lobe, (5) hepatic artery and portal vein, (6) hepatic lymph nodes, (7) gall bladder.



Seven is the first number not to contain any letter for the first time.

The first space astronaut to go into space seven times till date

Jerry Ross (U.S.A.)