Question 1
------------------
2, 4, 8, 16, 32, 64

Question 2 - method 1
------------------
#include <iostream>

using namespace std;

int main()
{
	int x, y;
  
	cout << "From: ";
	cin >> x;
	
	cout << "To: ";
	cin >> y;	
 
    	if (x%4!=0)
       		x = x +4 - x%4;

	while (x<=y)
	{
        		cout << x << endl;
        		x=x+4;
	}

	cout << endl;

	return 0;
}

Question 2 - method 2
-----------------------------
#include <iostream>

using namespace std;

int main()
{
	int x, y;
  
	cout << "From: ";
	cin >> x;
	
	cout << "To: ";
	cin >> y;	

	while (x<=y)
	{
        		if(x%4==0)
                  		cout << x << endl;
        		x=x+1;
	}

	cout << endl;

	return 0;
}

Question 3
-----------------------
#include <iostream>

using namespace std;

int main()
{
	int n, s=0;
  	
	cout << "n= ";
	cin >> n;	

	while (n>0)
	{
          		s=s+n*n*n;
          		n=n-1;
	}

	cout << s << endl;

	return 0;
}

Question 4
-----------------------
#include <iostream>

using namespace std;

int main()
{
	float n, sum=0;
	cout << "Enter an integer:  ";
	cin >> n;
	while (n>0)
	{
	     	if(n==1)
	                		cout << "1/" << n;
	     	else
               		 	cout << "1/" << n << "+";	
		sum=sum+1/n;
		n=n-1;
	}
	cout << "=" << sum << endl;
 

	return 0;
}


Question 5
-----------------------
4554		254
29799		299
16233		233
53000		200
92731		231


Question 6
-----------------------
#include <iostream>
#include <time.h>

using namespace std;

int main()
{
	int i, x, y;

	srand(time(NULL));

	i = 0;
	while (i < 6)
	{
		x = rand();
		y = x % 10 + 20;
		cout << y << endl;
		i = i + 1;
	}

	return 0;
}

Question 7
--------------------------
(a) 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19
(b) 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48
(c) -5, -4, -3, -2, -1, 0, 1, 2, 3, 4
(d) 1, 3, 5, 7, 9, 11, 13, 15, 17, 19

Question 8
-------------------------
#include <iostream>

using namespace std;

int main()
{
	int i;
	int number[10]={36, 81, 45, 17, 69, 3, 23, 92, 70, 54};
	i = 0;
	while ( i < 10 ){
		if(number[i]%2==1)
     			cout << number[i] << ", ";
		i = i + 1;
	}

	return 0;
}

Question 9
--------------------------
#include <iostream>

using namespace std;

int main()
{
	int i,x,y,temp;
	int number[10]={36, 81, 45, 17, 69, 3, 23, 92, 70, 54};


	while (1)
	{
		i = 0;
		while ( i < 10 )
		{
			cout << number[i] << ", ";
			i=i+1 ;
		}
		cout << endl << endl;

		cout << "Array index 1 = ";
		cin >> x;
		while ((x<0) || (x>9))
		{
			cout << "Array index 1 = ";
			cin >> x;
		}
		cout << "Array index 2 = ";
		cin >> y;
		while ((y<0) || (y>9))
		{
			cout << "Array index 2 = ";
			cin >> y;
		}

        		temp = number[x];
       		number[x] = number[y];
        		number[y] = temp;
        
	}


	return 0;
}

Question 10
-----------------------------
#include <iostream>

using namespace std;

int main()
{
	int i,x;
	int number[10]={36, 81, 45, 17, 69, 3, 23, 92, 70, 54};


	cout << "Array index = ";
	cin >> x;
	while ((x<0) || (x>9))
	{
		cout << "Array index = ";
		cin >> x;
	}
        	i = 0;
        	while( i < 10 ){
               		if(number[i]%x == 0)
                              	number[i] = 0;
               		i = i + 1;
        	}
        	i = 0;
        	while ( i < 10 )
	{
		cout << number[i] << ", ";
		i=i+1 ;
	}

	return 0;
}