Bai 2

#include<cstdlib>

#include<iostream>

using namespace std;

int main()

{

int i,N,s=0,tong=0;

cout<<"Hay nhap so N:";

cin>>N;

cout<<endl;

for(i=1;i<N;i++)

if(N%i==0)

{

s++;

tong=tong+i;

}

cout<<s<<endl;

cout<<tong<<endl;

system("pause");

return 0;

}

Bai 6

#include<cstdlib>

#include<iostream>

#include<cmath>

using namespace std;

int main()

{

int a,b,c;

cout<<"nhap vao 3 nguyen a, b, c:";

cin>>a>>b>>c;

if (a>b)

if (b>c)

cout<<c<<" "<<b<<" "<<a;

else

if (a>c)

cout<<b<<" "<<c<<" "<<a;

else cout<<b<<" "<<a<<" "<<c;

else

if (b<c)

cout<<a<<" "<<b<<" "<<c;

else

if (a<c)

cout<<a<<" "<<c<<" "<<b;

else cout<<c<<" "<<a<<" "<<b;

system("pause");

return 0;

}

Bai 4

#include<cstdlib>

#include<iostream>

using namespace std;

int main()

{

int i,N,M,s,dem=0;

N!=M;

cout<<"Hay nhap N,M (dk N # M ):";

cin>>N>>M;

if (N>M)

{

for(i=1;i<=M;i++)

if (((N%i)==0)&&((M%i)==0))

dem++ ;

cout<<dem<<endl;

}

else

{

for(i=1;i<=N;i++)

if(((N%i)==0)&&((M%i)==0))

dem++;

cout<<dem<<endl;

}

system("pause");

return 0;

}