Wednesday, April 30, 2008

Solution time!

Remember the maths question I posted last week? Just to recap:

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 on the bus?
Want the solution?

Number of girls = 7
Number of backpacks = 7 x 7
Number of big cats = 7 x 7 x 7
Number of little cats = 7 x 7 x 7 x 7
Total number of legs = (7 x 2) + (7 x 7 x 7 x 4) + (7 x 7 x 7 x 7 x 4) = 14 + 1 372 + 9 604
= 10 990

Are you smarter than a 5th grader?

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