If 7 cats can kill 7 rats in 7 minutes, how long will it take 100 cats to kill 100 rats?
Select the correct option.
A) 5 minutes
B) 6 minutes
C) 7 minutes
D) 8 minutes
E) 9 minutes
It will take 7 minutes for 100 cats to kill 100 rats.   1 cat can kill 1 rat in 7 minutes, so 100 cats can kill 100 rats in 7 minutes   Answer 7 minutes
<result>C</result>
If 7 cats can kill 7 rats in 7 minutes, how long will it take 100 cats to kill 100 rats?