$$75\div7=10R5$$ 
Cassandra is helping her mother to pack $$75$$ cupcakes. The boxes that her mother prepare can only fit $$7$$ cupcakes. She must ensure the box is full before she can use the next box. How many boxes she can fill up? 
  - $$1$$ 
  - $$5$$ 
  - $$10$$ 
  - $$68$$ 
  - $$70$$ 