Question 7
Mr. Chan is filling his fish tank. If he uses a 5-litre pail, 4 litres of water will overflow. If he uses a 3-litre pail, he needs another 4 pails of water. How many litres of water are needed to fill the fish tank?
Use the intended shared-count assumption: starting from an empty tank, compare the same initial number of full pails in both cases; the four extra pails are 3-litre pails. This shared initial count is not explicit in the printed source.
Use the intended shared-count assumption: starting from an empty tank, compare the same initial number of full pails in both cases; the four extra pails are 3-litre pails. This shared initial count is not explicit in the printed source.