Question

A number of cats got together and decided to kill between them 999919 rats. Every cat killed an equal number of rats. Each cat killed more rats than there were cats. How many rats do you think that each cat killed ?
A) 1009
B) 991
C) 2000
D) 1000

Answer 1

999919 = 1000000 - 81 = 1000^2 - 9^2 = (1000+9)(1000-9) = 1009*991.
Since there were more mice than there were cats, 991 cats killed 1009 mice each.

Answer 2

b option is the right answer