$50+10=60$  $60\div6=10$ 
Cindy has $$50$$ bookmarks. If she were to give $$6$$ bookmarks to each of her classmates, she would need $$10$$ more bookmarks. How many classmates does Cindy have? 
Options:
- $$4$$ 
- $$6$$ 
- $$10$$ 
- $$12$$ 