Math
posted by Glenn .
There are 7 girls in a room.
Each girl has 7 backpacks in the room.
In each backpack there are 7 big dogs.
For every big dog, there are 7 puppies too!
HOW MANY LEGS ARE IN THE ROOM?

girls 7*2 = 14
big dogs 7 girls * 7 backpacks*7 big dogs* 4 = 7^3*4 =343*4 = 1372
puppies
343 big dogs * 7 * 4 = 9604
so
14+1372+9604 
7 girls x 2 legs per girl = 14 legs.
7 girls x 7 backpacks = 49 backbacks.
49 backpacks x 7 big dogs = 343 big dogs
343 big dogs x 4 legs per dog = 1372 legs
343 big dogs x 7 puppies = 2401 pupies
2401 puppies x 4 legs per puppy = 9604 legs
Total legs = 9604 + 1372 + 14
Total legs = 10,990 legs
Done!