AoPS_Number_Theory 2: Primes and Composites

lilijia Post in AoPS_Number_Theory，
09 February 2020
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AoPS_Number_Theory 2020 Spring Week 2:  Primes and Composites

Welcome new friend Quinn! It’s great fun to try our first online class today. The kids did a great job participating in the class activities!

Lesson Review:

  • Prime number & composite number
  • 0,1 (special numbers)
  • Methods to identify prime numbers:
    • Sieve of Eratosthenes
    • Test prime factors from 2 to root square of q
  • Perfect number (a positive integer that is equal to the sum of its proper divisors): 6, 28, 496, 8128…

Homework:

  • Page 31: Ex 2.3.2
  • Page 35: Ex 2.4.1, 2.4.2
  • Page 37: Ex 2.7, 2.9 (a) (c) (e), 2.10. 2.11
  • Page 38: Ex 2.14, 2.15

Other Resources:

https://www.mathsisfun.com/numbers/prime-number-activity.html

https://www.britannica.com/science/perfect-number

No school for the following 2 weeks. No school for the following 2 weeks. Hope the Coronavirus gets controlled soon. Best wishes to our motherland China!

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