
Each Girl has 7 bags
In each bag there are 7 Big Cats
And each Big Cat has 7 Little Cats
All the Cats have 4 legs, each.
So: How many legs are in the Bus? :-)
Note: The solution of this question is the key (or password) of a .xls file, which explains all the steps to find that result. If you want this file send me an e-mail, and I’ll send it to you.