Question

How to understand a prime number?

Answer 1

Basically,Prime number is the number which is only divided by itself and one.

We all know that 1 is divided by each and every number so erase the idea of divided by one.

It is a number which has no dividend other than its own self.

Eg:- 7 is only divided by itself and 1 and 43 is also in this group.

Hope this helps.......

Answer 2

take example of number 5.
this number is only divisible by 1 and 5 itself. is there any other multiple? no.
thus 5 is a prime number.

take 6 as another example.
it is divisible by 1 and 6 itself.we are also able to see that it can be a multiple of 2 and 3.
as 6 is having factors other than 1 and itself, it is not a prime number.but 5 has none other factors than 1 and itself.
so 5 is a prime number.

the numbers that do not have any other factors except 1 and itself are considered as prime numbers.

hope it helps!!!!