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5%

It takes 5 cats 5 hours to catch 5 mice. How long would it take 7 cats to catch 7 mice?

Fact Lab

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Interesting fact:

A study of 1 million students in a New York school concluded that cafeteria food affected IQ scores. So when preservatives, dyes, artificial flavors and colors were removed from the students’ diets, their IQ’s improved too.