Операция деления x = 3786;
a = x%100;
b = x / 1000;
c = x%5000;
d = x/10%10;
k = x%3;
t = x/10000;
m = x/20;
n = x%100/10;
y = x/10%2;
z = x%100/3;

! ​

uses crt;
var a, b, c, n, i, j :integer;   
s :array [1..10000] of integer;
begin
   clrscr;
   writeln ('Vvedite razmer masiva');
   read (n);
   writeln  ('Vvedite chislo X');
   read (a);
   for i:=1 to n do 
   begin 
      writeln ('Vvedit s[', i, '] element'); 
      read (s[i]); 
   end;
   for i:=1 to n do 
      for j:=1 to n-1 do 
         if s[j]<s[j+1] then   
         begin   
            b:=s[j];   
            s[j]:=s[j+1];   
            s[j+1]:=b;   
         end;
   for i:=1 to n do 
   begin 
      write (s[i], ' '); 
      if s[i]=a then inc (c); 
   end;
writeln;
if c>0 then writeln ('3adanoe chislo prisytstvyet') else writeln('3adanoe chislo otsytstvyet');
end.

P.S. Надеюсь на благодарность и лучший ответ.

Uses Crt;
  const n=5; m=7;
  type Mas = array [1..n, 1..m] of integer;
  var i, j, j1, j2: integer;
      Sumj1, Sumj2: real;
      A: Mas;
begin
 ClrScr;
 Randomize;
 SumJ1:=0; SumJ2:=0;
 for i:=1 to n do
    for j:=1 to m do
    A[i,j]:=random (10);
 WriteLn (' Massiv A: ');
 for i:=1 to n do
   begin
      for j:=1 to m do
      Write (A[i,j]:4);
      WriteLn;
   end; WriteLn;
 repeat
   Write (' Stolbez #1 = ');    ReadLn(j1);
 until (j1>=1) and (j1<=m);
 repeat
   Write (' Stolbez #2 = '); ReadLn(j2);
 until (j2>=1) and (j2<=m) and (j1<>j2);
 for i:= 1 to n do
    SumJ1 := SumJ1+A[i,j1];
 for i:= 1 to n do
   SumJ2:=SumJ2+A[i,j2];
 SumJ1:=SumJ1/n; SumJ2:=SumJ2/n; 
WriteLn;
WriteLn (' Srednee stolbza ', j1, ' = ', SumJ1:4:2);
WriteLn (' Srednee stolbza ', j2, ' = ', SumJ2:4:2); 
ReadLn;
end.