Number Magic 


Question : 
How would you describe Prime Numbers and Composite Numbers ? 
Answer : 
A prime number is a whole number that only has two factors which are itself and one.
A composite number has factors in addition to one and itself.

An integer can be called a prime number when it has no integral factors except unity and itself, such as 2, 3, 5, 7, 11, or
13.

Numbers which have factors such as 9, 15, 25, 32 are composite numbers. 
About twentytwo centuries ago, a Greek
geographerastronomer named Erasosthenes used a sieve for sifting the composite numbers out of the natural numbers. And the
remaining are prime numbers.

Prime numbers and their properties were first studied by the ancient Greek mathematicians.

The numbers 0 and 1 are neither prime nor composite.
