Test: Are You Smarter than a 5th Grader ?

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Are you smarter than a 5th grader? The challenge is on -

Can you open the attached spreadsheet ?
 
 
This is a real 5th grade math problem. If you can open the spreadsheet, you'll see that only a small list of people( older than 5th graders) have gotten the correct answer. This is not a trick question. This is a real math problem so don't say that a bus has no legs.
 
There are 7 girls in a bus.
Each girl has 7 backpacks.
In each backpack, there are 7 big cats.
For every big cat, there are 7 little cats.
 
Question: How many legs are there in the bus?
 
The number of legs is the password to unlock the excel spreadsheet.
If you open it, add your name to the list and send it on to see who else can unlock it.

Good Luck!

PS: my name is already on the list.. :D

Attachment: Smarterthana5thgrader-3.xls