Câu 1:

uses crt;

var n,i,kt:integer;

begin

clrscr;

write('Nhap n='); readln(n);

if n<2 then writeln(n,' khong la so nguyen to')

else begin

kt:=0;

for i:=2 to n-1 do 

  if n mod i=0 then kt:=1;

if kt=0 then writeln(n,' la so nguyen to')

else writeln(n,' khong la so nguyen to');

end;

readln;

end.

Câu 2: 

uses crt;

var a:array[1..100]of integer;

i,n,max,min:integer;

begin

clrscr;

write('Nhap n='); readln(n);

for i:=1 to n do 

  begin

write('A[',i,']='); readln(a[i]);

end;

max:=a[1];

min:=a[1];

for i:=1 to n do 

  begin

if max<a[i] then max:=a[i];

if min>a[i] then min:=a[i];

end;

writeln('So lon nhat la: ',max);

writeln('So nho nhat la: ',min);

readln;

end.

#include <bits/stdc++.h>

using namespace std;

long long n,i,a[10000];

int main()

{

cin>>n;

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

cin>>a[i];

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

cout<<a[i]<<" ";

}

#include <bits/stdc++.h>

using namespace std;

long long a,b;

int main()

{

cin>>a>>b;

cout<<a-b;

return 0;

}

#include <bits/stdc++.h>

using namespace std;

long long n,x,t;

int main()

{

cin>>n;

t=0;

while (n>0)

{

x=n%10;

t=t+x;

n/=10;

}

cout<<t;

return 0;

}

Var t,n:integer;

begin

write('nhap n = ');readln(n);

while n div 10 <> 0 do

begin

t:=t+(n mod 10);

n:=n div 10;

end;

write('Tong cac chu so cua ',n,' la ',t);

readln;

end.

Bạn kiểm tra lại đề nha; M, N có liên quan gì đến tổng S bạn nhỉ?

program ct_dautien;

uses crt;

var x:integer;

begin

writeln('moi nhap a,b');readln(a,b);

if a>b then write(a) else write (b);

readln

end.

minh viet lon, sua lai: var a,b: integer;

Bài 1 :

Uses crt;

Var x,y:integer;

Begin

clrscr;

Readln(x,y);

Write('Tong cua x,y la ',x+y);

Readln

End.

Bài 2 :

Uses CRT;

var x,y,z:integer; tbc:real;

begin

clrscr;

readln(x,y,z);

tbc:=(a+b+c)/3;

Write('Trung binh cong x,y,z la ',tbc:4:2);

Readln

End.