Первая программа:program First_program;var i: longint;begin for i := 15 to 35 do begin if(i mod 2 = 0) then write(i, ' ') end;end.Вторая программа:program Second_program;var i, h, g: integer; k: string;begin k := ''; for i := 1 to 20 do if i mod 2 = 0 then write(i, ' '); writeln; for i := 20 to 30 do if odd(i) then k := k + i + ','; g := length(k); for i := g downto g - 1 do if (k[i] = ',') then delete(k, i, 1); write(k)end.Третья программа:program Third_program;var i, sum, proz: integer;begin sum := 0; proz := 1; for i := 1 to 10 do if (i mod 2 = 0) then sum := sum + i else proz := proz * i; writeln(sum); write(proz);end.Четвертая программа:program Fourth_program;var i: longint; k: integer;begin k := 0; for i := 10 to 99 do if (i mod 2 = 0) and (i mod 3 = 0) then k := k + i; write(k)end.