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Finding Prime & Composite numbers by using the Sieve of Eratosthenes


Interactive Sieve of Eratosthenes and many more interactive math activities!

One and five sixth and one and one sixth and one and two sixths equals four and two sixths

from Teachers Pay Teachers

Eratosthenes Sieve and Prime Numbers

Eratosthenes, a brilliant mathematician in history, devised the sieve analogy used to separate prime numbers from composite numbers. The importance of prime numbers is discussed as being the foundation all of natural numbers. A follow-up assignment (with rubric) is included for the students, and you will be able to display this work in your classroom.