Definations

 Prime number= a number which is divisible by 1 or by itself is called a prime number

Composite number=numbers which are divisible by other than 1 or itself  example 8,10,4 etc

Coprime numbers= coprime numbers are  those whose HCF Is 1but need not be prime example (25, 8) there HCF is 1but both are not a prime numbers