If 7 cats kill 7 rats in 7 minutes how many would be needed to kill hundred rats in fifty minutes?
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Seven cats kill seven rats in seven minutes which means 1 cat will kill 1 rat in one minute.
Cats required to kill 100 rats = 100 cats
Cats required to kill 100 rats in 50 minutes = 100 × 2cats
= 200 cats
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