posted by alyse .
Jane's aquarium contains goldfish, turtles, and snails. There are 16 legs, 10 shells, and 36 eyes in the aquarium. How many creatures of each type are in the aquarium? (Hint: Snails have two eyes, one shell, and one leg.)
Since there are 36 eyes and all the animals have 2 eyes, there are 18 animals total. Fish have no legs. Since there are 10 shells, the combined number of turtles and snails = 10. This means that there are 8 fish. The ten shelled animals share 16 legs. How can these 10 animals share these 16 legs, some with 4 and others with one?