Posted by **Pennie** on Tuesday, December 18, 2007 at 12:01am.

The world's population is over 6 billion people. A estimate of 1/6 of them celebrate Christmas. Santa works from midnight until 6:00am. How much time does Santa have to visit each house? How many houses must he visit each second? Allow for 4 people per household and 24 time zones.

- Advanced Algebra -
**drwls**, Tuesday, December 18, 2007 at 12:33am
By going from east to west, Santa gets to cross time zone boundaries and set his watch back one hour 24 times. Therefore he has 24+6 = 30 hours of real elapsed time to accomplish his mission. To visit 1 billion Christmas-observing people in 30 hours, thatr means 10^9/(30*60*60) = 9260 people (2315 houses) per second.

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