Yesterday we identified all of the prime numbers under 100 using the Sieve of Eratosthenes. Click here to see an interactive version of it (and this time it goes up to 400!)
Remember... a prime number is a whole number that only has two factors: 1 and itself. A number with more than two factors is called composite
The numbers 0 and 1 are neither prime nor composite.
*2 is the only even prime number! All other even numbers are divisible by so are automatically composite numbers.
The prime numbers between 2 and 100 are
2, 3, 5, 7, 11, 13,
17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97.
Review prime and composite numbers with this activity
Play the Factor Game!
Remember... a prime number is a whole number that only has two factors: 1 and itself. A number with more than two factors is called composite
The numbers 0 and 1 are neither prime nor composite.
*2 is the only even prime number! All other even numbers are divisible by so are automatically composite numbers.
The prime numbers between 2 and 100 are
2, 3, 5, 7, 11, 13,
17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97.
Review prime and composite numbers with this activity
Play the Factor Game!