Prime and Composite Numbers

Factors Factors are 2 numbers that are multiplied to get a product. Example: The factors of 10 are 1, 2, 5 and 10 because: 1x10=10 2x 5=10

Prime Number A number larger than one that has only 2 factors; 1 and itself

Composite Number A number larger than one that has 3 or more factors

Watch the video on the Sieve of Eratosthenes Use your headphones and click on the link below

Interactive Sieve

Write down all of the prime numbers from on your post-it note. Keep it neat.

Play this game. Use your headphones. First play for the numbers up to 20 Then play the game for the numbers up to 50 Finally play the game for the numbers up to 99 t_prime.htm t_prime.htm