Brainteasers

[Johann]

appolose said:

Johann said:

Ok, another one:

One and a half cat eats one and a half rat in one and a half minute. How many cats eat 60 rats in 30 minutes?

 

2, right?   It takes one minute for a cat to eat a rat, as dividing all by 1.5 yields.  And 60 rats in 30 minutes is 2 per minute, so two cats.

That`s right. Ok, I won`t post again until I have a harder one...