Câu 1: 

uses crt;

var a:array[1..500]of integer;

i,n,t:integer;

begin

clrscr;

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

for i:=1 to n do 

  begin

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

  end;

t:=0;

for i:=1 to n do 

  if (a[i]<0) and (a[i] mod 7=0) then t:=t+a[i];

writeln('Tong cac so am chia het cho 7 la: ',t);

readln;

end.

Câu 2: 

uses crt;

var c,a:array[1..10]of integer;

i,kt,j,dem:integer;

begin

clrscr;

for i:=1 to 10 do 

  begin

write('C[',i,']='); readln(c[i]);

end;

dem:=0;

for i:=1 to 10 do 

  if c[i]>1 then 

begin

kt:=0;

for j:=2 to c[i]-1 do 

  if c[i] mod j=0 then kt:=1;

if kt=0 then 

begin

inc(dem);

a[dem]:=c[i];

end;

end;

if dem=0 then writeln('Trong day khong co so nguyen to')

else begin

writeln('Cac so nguyen to trong day la: ');

for i:=1 to dem do

write(a[i]:4);

end;

readln;

end.

Câu 3: 

uses crt;

var d:array[1..200]of integer;

i,k,dem:integer;

begin

clrscr;

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

for i:=1 to k do 

  begin

write('D[',i,']='); readln(d[i]);

end;

dem:=0;

for i:=1 to k do 

  if (a[i] mod 2=0) and (a[i]>=10) then inc(dem);

writeln('So phan tu chan co 2 chu so la: ',dem);

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]<<" ";

return 0;

}

bprogram min 

uses crt 

var A: array [1...250] of integer

tong :integer;

begin 

tong:=0

writeln(‘nhap n:’); readln (n) 

forr i:=1 to n do 

begin 

writeln (‘nhap phan tu thu ‘,i);

readln (A[i] );

end

for i:=1 to n do 

begin

if (A[i] mod 3=0) 

then tong:=tong +A[i];

end

writeln (Tong cac phan tu chia het cho 3) 

readln ;

end

Program Vidu;
Uses crt;
Type Mang1C = array[1..250] of Integer; 
Var A:Mang1C;
i:integer;
Begin
        clrscr;
        Writeln
        For i:=1 to 250 do 
        Begin
                Write
                Readln
        End;
        Write
        For i:=1 to 250 do
                Write
        Readln;
End.

cau 1:

uses crt;

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

n,i,min: integer;

begin

readln(n);

for i:=1 to n do

readln(a[i]);

min:=a[1];

for i:=2 to n do

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

writeln(a[i]);

readln;

end.

cau 2:

uses crt;

g:text;

s:string;

const fo='CHUSO.TXT'

begin

assign(g,fo);

rewrite(g);

readln(s);

for i:=1 to length(s) do

if not((s[i] in ['a'..'z'])and(s[i] in ['A'..'Z])) then delete(s,i,1);

writeln(g,s);

end.

uses crt;

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

n,i,k,dem,dem1:integer;

begin

clrscr;

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

for i:=1 to n do 

  begin

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

end;

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

dem:=0;

dem1:=0;

for i:=1 to n do 

  begin

if a[i] mod 2=0 then inc(dem);

if a[i] mod k=0 then inc(dem1);

end;

writeln('So phan tu chan la: ',dem);

writeln('So phan tu chia het cho ',k,' la: ',dem1);

readln;

end.

Đề thiếu rồi bạn

uses crt;

var C : array [1 .. 50] of integer;

i, n : integer;

begin

clrscr;

write('Nhap so phan tu : '); readln(n);

write('Nhap day gom ', n ,' so : ');

for i := 1 to n do read(C[i]);

write('Cac gia tri chan : ');

for i := 1 to n do

if C[i] mod 2 = 0 then write(C[i], ' ');

readln

end.

#include <bits/stdc++.h>

using namespace std;

long long a[1000],n,i,dem,t,j,t1;

int main()

{

cin>>n;

for (i=1; i<=n; i++) cin>>a[i];

for (i=1; i<=n; i++) cout<<a[i]<<" ";

cout<<endl;

dem=0;

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

{

t=0;

for (j=1; j<=a[i]-1; j++)

if (a[i]%j==0) t+=j;

if (t==a[i]) dem++;

}

cout<<dem<<endl;

t1=0;

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

if (a[i]%2==0) t1+=a[i];

cout<<t1;

return 0;

}