This macbook pro is a senior citizen, like most of us, but still works well, better than most of us. It no longer has a battery, but works just fine when plugged into the wall with AC. It has 3GB of Ram, 500GB of disk, a 2.33Ghz processor, and is running Mac OS X 10.8.

For sale for one Peso plus the answer to one question.

Numbers that are not divisible by a square are called square free. For example, the numbers less than 20 that are square free are
1,2,3,5,6,7,10,11,13,14,15,17,19 but not
4,8,9,12,16,18
so how many numbers less than 3 ^ 33 that is less than 5559060566555523 are square free.

Here are the rules:

To buy your macbook you must not only provide the answer to this question, but explain how you arrived at that answer. You may be accompanied by a bright young man or woman who may not be more than a senior in college who can "help" you with the explanation.

Quote of the day:
War does not determine who is right, war determines who is left.
Unknown

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