Monday, January 25, 2010

Class Task : Factors & Multiples

Please use your learning device to source for information on the following:

  1. A man named Erastothenes (Ren Chang's grp)
  2. Erastothenes Sieve (Imran's grp)
  3. All the Primes less than 1000 (Christian's grp)
  4. Mersene Prime (Aaron's grp)

Prime Quiz (PART 1) for all as hw

http://home.clara.net/dkeith/maths/y9project/prime-quiz.htm

9 comments:

  1. Eratosthenes of Cyrene (Greek Ἐρατοσθένης; c. 276 BC[1] – c. 195 BC[2]) was a Greek mathematician, elegiac poet, athlete, geographer, and astronomer. He made several discoveries and inventions including a system of latitude and longitude. He was the first Greek to calculate the circumference of the earth (with remarkable accuracy), and the tilt of the earth's axis (also with remarkable accuracy); he may also have accurately calculated the distance from the earth to the sun and invented the leap day.[3] He also created a map of the world based on the available geographical knowledge of the era. In addition, Eratosthenes was the founder of scientific chronology; he endeavored to fix the dates of the chief literary and political events from the conquest of Troy.
    According to the entry Ἐρατοσθένης in the Suda (ε 2898), his contemporaries nicknamed him Βῆτα (beta, the second letter of the Greek alphabet) because he supposedly proved himself to be the second best in the world in almost any field.[4]

    Source:http://en.wikipedia.org/wiki/Eratosthenes
    /wikipedia

    Group members: Tse tzang, Bing jue, Jit Sheng, Ren chang, Ethan , Eunice

    ReplyDelete
  2. Source 1:http://en.wikipedia.org/wiki/Eratosthenes_Sieve
    Source 2:http://www.hbmeyer.de/eratosiv.htm

    What is Erastothenes Sieve?
    -It is a system to find all prime numbers up to a specified integer.
    Source: Wikipedia

    ReplyDelete
  3. http://www.infoplease.com/ipa/A0001737.html

    2, 3, 5, 7 ,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73 79 83 89 97 101 103 107 109 113
    127 131 137 139 149 151 157 163 167 173
    179 181 191 193 197 199 211 223 227 229
    233 239 241 251 257 263 269 271 277 281
    283 293 307 311 313 317 331 337 347 349
    353 359 367 373 379 383 389 397 401 409
    419 421 431 433 439 443 449 457 461 463
    467 479 487 491 499 503 509 521 523 541
    547 557 563 569 571 577 587 593 599 601
    607 613 617 619 631 641 643 647 653 659
    661 673 677 683 691 701 709 719 727 733
    739 743 751 757 761 769 773 787 797 809
    811 821 823 827 829 839 853 857 859 863
    877 881 883 887 907 911 919 929 937 941
    947 953 967 971 977 983 991 997
    Zach,Eugene,Christian,Norman,Michelle,Celine

    ReplyDelete
  4. A mersene prime is a prime number follows this equation 2n-1.And "n" must be a prime.For example,127 is a mersenne prime.2 to the power of 7 -1 is 127.


    Group 1:Kristin,Kang Yan,Jun Hao,Jun Peng,Wen Kai and Aaron

    No source

    ReplyDelete
  5. I scored 10 out of 10 for the quiz

    ReplyDelete
  6. well done Kristin - how about the rest?

    ReplyDelete
  7. Lucky Kristin, I only score 8 out of 10 for the quiz.
    Jing Heng

    ReplyDelete
  8. I got 8-10 too.

    Aaron Sng Li Wen

    ReplyDelete
  9. I got 10 out of 10 for the quiz

    tse tzang

    ReplyDelete