If 5 cats can kill 5 rats in 5 minutes, how long will it take 100 cats to kill 100 rats?  Answers.
A) 1 minutes
B) 2 minutes
C) 3 minutes
D) 4 minutes
E) 5 minutes
It will take 5 minutes for 100 cats to kill 100 rats.   1 cat can kill 1 rat in 5 minutes, so 100 cats can kill 100 rats in 5 minutes   Answer 5 minutes
<result>E</result>
If 5 cats can kill 5 rats in 5 minutes, how long will it take 100 cats to kill 100 rats?