Problem of the Week #1:  (Fall, 2014, for the week of 8/18/2014 – 8/22/2014)

During a brutal medieval battle, 85% of the combatants had the misfortune to lose an ear, 80% lost an eye, 75% lost an arm, and 70% lost a leg. Determine the least percentage possible of the warriors who lost all four (ear, eye, arm and leg). Clearly show the mathematical process that you use to find your solution.

Solutions are due at or before noon, Friday August 22.



  1. This contest is open to any students who are registered at Sinclair for the Fall semester of 2014.  It is expected that students will work alone on the problems.
  2. Weekly problems will be posted on the board in the Math Help Room Monday mornings.  Solutions to a problem will appear there the following week.
  3. All answers must be substantiated by hand for credit (show all work).  Programs written to solve the problem by computer or calculator will not count as sufficient justification.
  4. Submit solutions to Susan Harris in room 01-331.  You may slip them under her office door anytime before Friday at noon.
  5. Names of all students who submit correct solutions on time will be posted by the following week.
  6. A prize of $50 will be awarded to the student who correctly answers the most problems for the quarter, and a prize of $25 will be awarded to the second place winner.


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