Prime numbers <200 - 3rd Sep 2008
We used the sieve of Eratosthenes to identify all of the prime numbers below 200.
This involves crossing out all the numbers that have factors other than 1 or themselves, by crossing out multiples of 2,3,5,7,9, and 11. All of the remaining numbers are prime.
The presentation below shows the result.
[...] We started the lesson today by trying to recall the first few prime numbers that we discuss a couple of lessons ago. [...]