Question

A nature Museum has 2008 specimens are early birds, some with two wings and some with for wings. The specimens have a total of 4038 wings. How many specimens are there with each number of wings?

Answer 1

If each bird had two wings, there would be 4016 wings. For each two-winged bird we replace with a four-winged bird, the total number of wings would increase by 2. We need 22 more wings, so 11 two-winged birds need to be replaced by four-winged birds. Thus, there are 1997 two-winged and 11 four winged birds.

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