How many cats do you think there were?

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A number of cats got together and decided to kill between them 999919 mice. Every cat killed an equal number of mice. How many cats do you think there were?
Ah, by the way let me clarify just two points it is not one cat killed the lot. because I have said Cats and it is not 999919 cats each killed one mouse, because I have used the word ‘mice’
I can give you just one clue—each cat killed more mice than there were cats.

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    Just one look at the number 999919 and we know that it cannot be a prime number. And if the problem has to have only one answer, this number can have only two factors. The factors are 991 and 1009. both of which are primes. We know that each cat killed more mice than there were cats, and,therefore,the correct answer, clearly, is that …… 991 cats killed 1009 mice.

    pnikam Expert Answered on 22nd August 2015.
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