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post #1 of 8 (permalink) Old 09-08-2013, 12:11 PM Thread Starter
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Are you smarter than a fifth grader?

There are 7 girls on 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?
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post #2 of 8 (permalink) Old 09-08-2013, 12:16 PM
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10,990 .......................

"To err is human, to forgive is canine"
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Sweet Amber @the Bridge 12-06-2011
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post #3 of 8 (permalink) Old 09-08-2013, 12:31 PM
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Don't forget the driver!
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post #4 of 8 (permalink) Old 09-08-2013, 12:32 PM
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Well if there are no amputees...

Driver, 2 legs

7 girls, 14 legs.

7 big cats, 28 legs.

7 kittens for every big cat 112.

156 legs

What do I win?


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post #5 of 8 (permalink) Old 09-08-2013, 12:37 PM
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Could be a trick question too, seats on the bus must have legs...


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post #6 of 8 (permalink) Old 09-08-2013, 12:45 PM
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7 Girls = 14 legs
7 backpacks per girl = 49 backpacks (no legs)
49 backpacks x 7 big cats each = 343 big cats
343 big cats x 4 legs each= 1372 legs
7 little cats x each big cat (343) = 2401 little cats
2401 little cats x 4 legs each = 9604 legs
2744 cats

Girl legs (14) + big cat legs (1372) + little cat legs (9604) + the driver (2) = 10992 legs.

However, if we're going to be all logical and insist that the bus has a driver, we might want to point out that there is no way that 7 big cats and 49 little cats will fit in a normal backpack, and a single person couldn't possibly carry 7 giant backpacks with 56 cats each in them.

So, as an algebra problem, it's 10990. As an algebra problem with a cute twist, it's 10992. As a trick question, it's 16 legs, since there's no way they'd allow these cat hoarding girls to bring all these cats on a bus, nor would they allow girls on a bus without at least one adult present.
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post #7 of 8 (permalink) Old 09-08-2013, 12:56 PM
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I so missed the 7 backpacks for each girl darnit. Guess I am not smarter than a fifth grader


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post #8 of 8 (permalink) Old 04-13-2014, 10:56 PM
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10992 legs...
But I have read the hint above
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