Final answer:
To find the total number of legs on the bus, excluding the bus driver, we calculate the legs of 7 girls, 49 backpacks containing 343 big cats, and 2401 kittens. The sum of the girls' legs (14), big cats' legs (1372), and kittens' legs (9604) gives us a total of 10990 legs.
Step-by-step explanation:
The student has asked a mathematical brain teaser which involves calculating the total number of legs on a bus, excluding the bus driver. Let's tackle this question step by step:
- First, there are 7 girls on the bus, and each girl has two legs. So, 7 girls x 2 legs each = 14 legs.
- Each girl has 7 backpacks, making a total of 7 girls x 7 backpacks = 49 backpacks.
- In each backpack, there are 7 big cats. Thus, 49 backpacks x 7 big cats = 343 big cats.
- Each big cat has 4 legs, which gives us 343 big cats x 4 legs = 1372 legs.
- For every big cat, there are 7 kittens. This results in 343 big cats x 7 kittens = 2401 kittens.
- Each kitten also has 4 legs, so 2401 kittens x 4 legs = 9604 legs.
Finally, to find the total number of legs on the bus, we add up the legs of the girls, the big cats, and the kittens, but we do not count the driver's legs:
Girls' legs + Big cats' legs + Kittens' legs = 14 legs + 1372 legs + 9604 legs = 10990 legs.
Hence, excluding the bus driver, there are 10990 legs on the bus.