Prime And Composite Numbers | Mathematics Grade 4 | Periwinkle
Today, let us learn prime and composite numbers before we being let us understand what do we mean by natural numbers, the set of numbers 1 2, 3, 4 5, 6, 7, 8. And so on are called natural numbers. Natural numbers can be divided into prime numbers and composite numbers before we proceed ahead. Remember that any given number will always have one and itself as its factors. Now, let us start with prime numbers. Look at the examples, the factors of 3 are 1 and 3 the factors of 11 are 1 and 11 the factors of 17. Are 1 and 17 all these numbers have only two factors one.
And the number itself such numbers are called prime numbers. Thus prime numbers are natural numbers that have only two factors one. And the number itself composite numbers. Look at the examples. The factors of 6 are 1 2, 3 &, 6, the factors of 14 are 1 2, 7 and 14. The factors of 20 are 1 2 5, 10 and 20 all the above numbers have more than two factors.
These numbers are called composite numbers. Thus composite numbers are natural numbers that have. More than two factors.
Remember, these points, one is neither prime nor composite as it has only one factor. Two is the smallest. And the only even prime number three is the smallest odd prime number. Now, why don't you list all the prime and composite numbers from 1 to 100.