Question
There were 421 boys and 159 more girls than boys in a bird park. Later, 21 boys and 18 girls left the bird park. How many fewer boys than girls were there in the end?
4 m

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There were 421 boys and 159 more girls than boys in a bird park. Later, 21 boys and 18 girls left the bird park. How many fewer boys than girls were there in the end?