$198+18=216$  $216\div6=36$ 
Siti has $$198$$ bookmarks. If she were to give $$6$$ bookmarks to each of her classmates, she would need $$18$$ more bookmarks. How many classmates does Siti have? 
(1) $$12$$ 
(2) $$24$$ 
(3) $$30$$ 
(4) $$36$$ 