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 class Prime
require'mathn'
 
max = 2_000_000
 
sum = 0
Prime.each { |x|
  break if x >= max;
  sum+=x
}

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#difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.
class Sum
def self.sum(number_set)
  sum = (number_set).map { |i| i*i }.reduce(:+)
    #put here the sum of squares of the numbers
  return sum
end

def self.square(number_set)
  square = (number_set).reduce(:+)**2

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#to find the biggest prime number
class Prime
	def initialize(num)
		puts "input value is #{num}"
	end
def primefactor(n)
	i=2
	largest=0
	while(i<=n)
		if(n%i==0)

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#To find the biggest frame
require 'prime'

max = 600851475143; test = 3

while (max >= test) do
  if (test.prime? && (max % test == 0))
    best = test
    max = max / test
  else

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#Ruby program for find the prime factor of 600851475143
    
    def gen_prime_factors(num) 
      result = []
      2.upto(num-1) do |i| 
       
        result.push i if num % i == 0
        puts "Prime factor found: #{i}" 
      end
      result

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puts"enter the first value"
a=gets.to_i
puts"enter the second value"
b=gets.to_i
c=a+b

puts"The output is :#{c}"

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#include <iostream.h>
#include <conio.h>

void main()
{
clrscr();
int countch=0;
int countwd=1;
cout << "Enter your sentence in lowercase: " << endl;
char ch='a';

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#include<iostream.h>
#include<conio.h>
void main()
{
	int a,b,s;
	cout<<"enter two numbers";
	cin>>a>>b;
	s=a+b;
	cout<<"the sum of two number is"<<s;
	getch();

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#include <iostream.h>
#include <conio.h>
#include <iomanip.h>
long triangle(int x,int y);
int main()
{
clrscr();
const lines=10;
for (int i=0;i<lines;i++)
for (int j=1;j<lines-i;j++)

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#include <iostream.h>
#include <conio.h>
#include <string.h>

void main()
{
clrscr();
int slength;
char x[81]; //Allowing the user to input a maximum of 80 characters.
cout << "Enter the string : " << endl;