Showing posts with label Prime number. Show all posts
Showing posts with label Prime number. Show all posts

Monday, July 26, 2010

Introduction to prime number list

Introduction to prime number list:

List of prime numbers is a number only factors are itself 1.For example, 13 is a prime numbers, since it only factors are 1 and 13 this is the beginning list of the prime numbers as show below.

Prime number list

Here 2 is only the even prime number.The list of all the prime numbers goes on without stopping

Problem 1:

Identify each of the numbers below as either a prime numbers or a composite number. For other that are composite, give two divisor other than the number itself or 1

1. 43
2. 12
This will also help us on permutations and combinations
Solution:

a. Here 43 is a prime numbers because the only number that divide it without a remainder are 43 and 1.

b.12 is a composite number, because it can be written as 12 = 4*3 which means that 4 and 3 are divisor of 12