static void Main(string[] args)
{
DisplayScreen pb6display = new DisplayScreen();
pb6display.ProblemTitle = "Problem 5";
pb6display.ProblemHeader = "Sum square difference";
pb6display.Description = "The sum of the squares of the first ten natural numbers is,\n12 + 22 + ... + 102 = 385\nThe square of the sum of the first ten natural numbers is,\n(1 + 2 + ... + 10)2 = 552 = 3025\nHence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 − 385 = 2640.\nFind the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.";
pb6display.DisplayHeader();
//////////////////////////////////////////////////////////////////
long a, b, result;
a = SumSquareDifference.SumSquares(100);
b = SumSquareDifference.SquareOfSum(100);
result = SumSquareDifference.Difference(b, a);
//Console.WriteLine(result);
pb6display.DisplayAnswer("difference is :", result);
pb6display.DisplayFooter();
Console.ReadKey();
}
static void Main(string[] args)
{
DisplayScreen pb4display = new DisplayScreen();
pb4display.ProblemTitle = "Problem 4";
pb4display.ProblemHeader = "Largest palindrome product";
pb4display.Description = "A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 × 99.\nFind the largest palindrome made from the product of two 3 - digit numbers.";
pb4display.DisplayHeader();
int biggestPalindrome = 0;
for (int i = 100; i < 1000; i++)
{
for (int j = 100; j < 1000; j++)
{
int result = NumberProduct.Product2Numbers(i, j);
if (Palindrome.IsPalindrome(result) && result > biggestPalindrome)
{
biggestPalindrome = result;
}
}
}
pb4display.DisplayAnswer("Biggest Palindrome is :", biggestPalindrome);
pb4display.DisplayFooter();
Console.ReadKey();
}
static void Main(string[] args)
{
DisplayScreen pb1display = new DisplayScreen();
pb1display.ProblemTitle = "Problem 1";
pb1display.ProblemHeader = "Multiples of 3 and 5";
pb1display.Description = "If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.Find the sum of all the multiples of 3 or 5 below 1000.";
pb1display.DisplayHeader();
int s = Multiples.SumOfMultiples(3, 5, 1000);
pb1display.DisplayAnswer("the total sum of multiples is", s);
Console.ReadKey();
}
static void Main(string[] args)
{
DisplayScreen pb2display = new DisplayScreen();
pb2display.ProblemTitle = "Problem 2";
pb2display.ProblemHeader = "Even Fibonacci numbers";
pb2display.Description = "Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:\n 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ... \n By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.";
pb2display.DisplayHeader();
int limit = 4000000;
int total = Fibonacci.SumEvenTerms(limit);
//Console.WriteLine("Fibonaaci sum for term " + term + " is " + a);
pb2display.DisplayAnswer("Fibonacci sum for even numbers under 4000000 is : ", total);
Console.ReadKey();
}
static void Main(string[] args)
{
DisplayScreen pb7display = new DisplayScreen();
pb7display.ProblemTitle = "Problem 7";
pb7display.ProblemHeader = "10001st prime";
pb7display.Description = "By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13.\nWhat is the 10 001st prime number ? ";
pb7display.DisplayHeader();
//////////////////////////////////////////////////////////////////
int order = 10001;
int result = PrimeNumberOrder.PrimeNumberST(order);
pb7display.DisplayAnswer("Prime number " + order + " is :", result);
pb7display.DisplayFooter();
Console.ReadKey();
}