1) a =2
2) y =17
3)
var a,b:word;
begin
readln(a,b);
if (b mod a=0) then
writeln('да') else writeln('нет');
readln
end.
4)
var a,b:real;
begin
readln(a,b);
If a>b then
begin
a:=abs(a*b);
b:=abs(a-b);
end
else
begin
a:=abs(a-b);
b:=abs(a*b);
end;
writeln('a= ',a:0:2,' ','b= ',b:0:2);
readln
end.