Capacity in a Cup

Mrs Watson posed the following question, "I have sets of all of these cups and if I need to make 8 cups of tea for myself and my friends which cup set should I use?  My kettle holds 1.8L of water.  Will I only have to boil the jug once?"

In our groups we used the measuring jugs to work out the capacity of each cup.  Then we multiplied that number by 8.

The answer to the question was no.  Most cups could hold 300mL of water.  Mrs Watson would have to boil the jug twice.