Level 3
The total capacity of a bottle and a mug is 8 ℓ. The total capacity of 3 such bottles and 5 such mugs is 31 ℓ. What is the capacity of each mug? Express your answer in ℓ
Level 3
There were 37 pupils in a class. 13 of the boys and 14 of the girls did not wear spectacles. Given that 26 pupils who wore spectacles, how many girls were there in the class?
Level 3
At a farm, there were 47 as many ducks and chickens. There were 48 more chickens than ducks. The farmer sold away some chickens. In the end, there were 89 as many ducks as chickens. How many chickens were sold away?
Level 3
Sarah had 35 as much money as Tricia. Sarah had $40 less than Tricia. Sarah spent some money to buy a birthday present for her friend. In the end, she had 14 as much money as Tricia. How much did Sarah spend on the birthday present?
Level 3
In a shopping mall, 58 of the customers were female. There were 56 more female customers. Within five minutes, some female customers left the shopping mall. As a result, there were 711 as many male customers as female customers. How many female customers left the shopping mall during the five minutes?
