The Bird Watching Program : Puzzle
Abel, Mabel, and Caleb went bird
watching. Each of them saw one bird that none of the others did. Each
pair saw one bird that the third did not. And one bird was seen by all
three. Of the birds Abel saw, two were yellow. Of the birds Mabel saw,
three were yellow. Of the birds Caleb saw, four were yellow.
How many
yellow birds were seen in all? How many non-yellow birds were seen in
all?
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Click here for SOLUTION!
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