Puzzle ZLCG 

Workings

Hint
How many toys can one kitten catch in twelve minutes?

Answer
36 toys.

Reasoning
   Four kittens can catch four toys in four minutes,

so

   one kitten can catch one toy in four minutes,

so

   one kitten can catch three toys in twelve minutes,

so

   twelve kittens can catch 36 toys in twelve minutes.