Rebecca wants to split a collection of marbles into groups of 4. Rebecca has 10 eggs and 20 marbles. How many groups will be created?
First, Rebecca has 10 eggs. She can't split these into groups of 4, so she'll put them aside for now. 

Next, she has 20 marbles. She can split these into 5 groups of 4. 

So in total, Rebecca will have 5 groups.