This lesson introduce prime and composite numbers. It gives the children an opportunity to use the sieve method to identify the prime numbers from 1 to 100.
• to show the difference between prime and composite numbers;
to show how the Sieve method can be used to identify prime numbers.
What is the difference between a prime number and a composite number?
? A prime number is a number with only two factors - itself and 1.
? A composite number has more than two factors.
What is a factor?
A factor is a number which divides evenly into another number.