Woman and Elevator

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?




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If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

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What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

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John is selling fruits.
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On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

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A man is walking down a road with a basket of eggs. As he
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In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki