Level 3
A barrel can hold 96 ℓ of water. A tank can hold 12 more litres of water than the barrel. An aquarium can hold 3 times as much water as the tank. If the aquarium is 34 filled with water, how much more water is needed to fill the aquarium completely?
Level 2
A factory produces 1020 shirts a day. 480 of them are long sleeves shirts. The rest are short sleeves shirts. How many short sleeves shirts does the factory produce in 5 days?