1:

#include <bits/stdc++.h>

using namespace std;

long long x;

int main()

{

cin>>x;

if (x%5==0) cout<<"Yes";

else cout<<"No";

return 0;

}

2: 

#include <bits/stdc++.h>

using namespace std;

long long x;

int main()

{

cin>>x;

if (x%15==0) cout<<"Yes";

else cout<<"No";

return 0;

}

C1:

khai báo:

      program  hieu_a_va_b   ("tự đặt tên cái này ko cần thiết)

      uses crt;

      var a, b : integer

phần thân:

       begin

            writeln ("nhap so a");  read(a);

            writeln ("nhap so b");  read(b);

             writeln ("hieu cua hai so la: a - b=" , a - b);

        end.

C2:

khai báo:

      program    tinh_ba_so

      uses crt;

      var a, b, c : integer

phần thân:

       begin

            writeln ("nhap so a");  read(a);

            writeln ("nhap so b");  read(b);

            writeln ("nhap so c");  read(c);

             writeln ("ket qua cua phep tinh a+b-c la" , a+b-c);

        end.

C3:

khai báo:

      program    tinh_ba_so

      uses crt;

      var x, y, z : integer

phần thân:

       begin

            writeln ("nhap so x");  read(x);

            writeln ("nhap so y");  read(y);

            writeln ("nhap so z");  read(z);

             writeln ("ket qua cua phep tinh (x+y)*z la") , (x+y)*z);

        end.

nhớ chạy thử chương trình nha. xem có lỗi ko.

(nhớ tick cho mk nha)

Câu 2: 

#include <bits/stdc++.h>

using namespace std;

long long a,b;

int main()

{

cin>>a>>b;

cout<<a-b;

return 0;

}

Tự học đi bạn ơi =))

program tinh;

uses crt;

var i,n,x:integer;

t:longint;

function luythua(n,x:integer):longint;

var m:integer;

begin

  m:=1;

  for i:=1 to n do

  m:=m*x;

  luythua:=m;

end;

function giaithua(n:integer):longint;

begin

  if n=0 then giaithua:=1

  else giaithua:=n*giaithua(n-1);

end;

begin

  clrscr;

  write('nhap n,x:');readln(n,x);

  t:=0;

  for i:=1 to n do

  t:=t+giaithua(luythua(i,x));

  writeln(t);

  readln;

end.

Bài 2: 

#include <bits/stdc++.h>

using namespace std;

long long x,y;

int main()

{

cin >>x>>y;

cout<<x<<" "<<y;

swap(x,y);

cout<<x<<" "<<y;

return 0;

}

Câu 1: 

uses crt;

var a,b:integer;

begin

clrscr;

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

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

if (a>0) and (b>0) then writeln('Cung duong');

if (a<0) and (b<0) then writeln('Cung am');

if (a>0) and (b<0) then writeln('Duong am');

if (a<0) and (b>0) then writeln('Am duong');

readln;

end.

Câu 2: 

uses crt;

var a,b:integer;

begin

clrscr;

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

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

if (a mod 2=0) and (b mod 2=0) then writeln('Cung chan');

if (a mod 2<>0) and (b mod 2<>0) then writeln('Cung le');

if (a mod 2=0) and (b mod 2<>0) then writeln('Chan le');

if (a mod 2<>0) and (b mod 2=0) then writeln('Le chan');

readln;

end.

câu 1

Program Nguyen_to;

Var n,i:integer;

Function NT(n:integer):Boolean;

Var ok: Boolean;

i: integer;

Begin ok:=true;

for i:=2 to n-1 do if (n mod i)= 0 then ok:=ok and false;

if n < 2 then NT:=false else NT:=ok;

End;

Begin Write('Nhap n: ');

Readln(n); i:=n;

Repeat i:=i+1;

Until NT(i);

Write('So nguyen to nho nhat lon hon ',n, 'la: ',i);

Readln End.

câu 2

uses crt;

const so: set of char=['0','1','2','3','4','5','6','7','8','9'];

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

st,b:string;

c,l,i,n,j:integer;

s, Max: integer;

begin clrscr;

write('Nhap xau:');

readln(st);

l:=length(st);

i:=1;

n:=0;

repeat if (st[i] in so) then begin b:=''

repeat b:=b+st[i];

inc(i);

until (not(st[i] in so)) or (i>l);

inc(n);

val(b,a[n],c);

end;

inc(i);

until i>l;

Max:=a[1];

for i:=2 to n do If Max<A[i] Then Max:=A[i];

Writeln('Phan tu lon nhat cua mang:', Max);

readln;

end.

Bài 1:

uses crt;

var n,i,s:integer;

begin

clrscr;

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

s:=0;

for i:=1 to n do 

 if i mod 6=0 then s:=s+i;

writeln(s);

readln;

end.

Bài 2: 

uses crt;

var a,b,c,ucln,i:integer;

begin

clrscr;

write('a='); readln(a);

write('b='); readln(b);

write('c='); readln(c);

while a<>b do 

  begin

if a>b then a:=a-b

else b:=b-a;

end;

ucln:=a;

while ucln<>c do 

 begin

if ucln>c then ucln:=ucln-c

else c:=c-ucln;

end;

writeln(ucln);

readln;

end.

Scratch hay java