High School Challenge

Week Ending 8-29-99

Send Answer to: ucfcasio@pegasus.cc.ucf.edu

Congratulations to Sara Agostinelli of Great Falls High School in Great Falls, MT. Sara wins the Casio CFX-9850G Color Graphing calculator.

The Lock A lock may be opened by depressing any of ten buttons. As the lock is delivered, a combination consists of exactly 5 of the 10 buttons. Pressing those 5 buttons in any order will open the lock. You elect to reset the lock so that as many as 9 buttons and as few as one will open it, again, in any order for the number of buttons you select. How many new combinations have you added?

Correct Solutions:

  1. Jia Cheng Chen. Edward R Murrow HS, Brooklyn, NY
  2. David Chan. Sydney Grammar School, Sydney, NSW, Australia
  3. Andrew Bourne. Beacon Comm Coll, Crowborough, East Sussex, England
  4. Sophy Zheng. Oak Park & River Forest HS, Oak Park, IL
  5. Billy O Gorman. Bruce College, Limerick, Ireland
  6. Asher Walkover. Rambam Mesivta, Lawrence, NY
  7. Adam Slattery. Wenztville Holt HS, Wenztville, MO
  8. Luke Burton. Homeschool, Palmer, AK
  9. Samuel Timothy Dy. St. Stephen's HS, Manila, Philippines
  10. Ruken Wang. James Madison HS, Brooklyn, NY
  11. Farnam Mohasseb. Abbotsford HS, Abbotsford, BC, Canada
  12. Patrick Paczkowski. American School of Warsaw, Warsaw, Poland
  13. Brett White. Greenwood Lakes MS, Lake Mary, FL
  14. Angelina Vidali. Eliniki Pedia, Iraklio Attikis, Greece
  15. Mark Bicket. North HS, Edmond, OK
  16. Nathaniel Major, Homeschool, Paso Robles, CA
  17. James Harris. Homeschool, Yakutsk, Russia
  18. Elizabeth Ann Almasi. Northgate HS, Clayton CA
  19. Tulika Kashyap. Kendriya Vidyalaya RK Puram, New Delhi, India
  20. Lisa Schechner. Manorhaven ES, Port Washington, NY
  21. Terry Fletcher. Sunnyside ES, Pullman, WA
  22. Jason Chiu. Laramie HS, Laramie, WY
  23. Ching Yi Lam. Beach Channel HS, Rockaway Park, NY
  24. Brian D. Ginsberg. New Trier HS, Winnetka, IL
  25. Aleksandra van Loggerenberg. Pretoria Chinese School, Pretoria, SA
  26. Ahilan Sivaganesan. E. H. Greene School, Cincinnati, OH
  27. Roger Laplante. Crestview HS, Crestview, FL
  28. Eva Koo. Steveston SS, Richmond, BC, Canada
  29. Rohan Mathew. Sycamore JHS, Cincinnati, OH
  30. Yiming Yao. New Westminster SS, New Westminster, BC, Canada
  31. John Pinto. Bishop Moore HS, Orlando, FL
  32. Jimmy Tang. White Hall JHS, White Hall, AR
  33. Cyrus Harvesf. Stanton College Prep, Jacksonville, FL
  34. Philip Vogel. Seven Hill Upper School, Cincinnati, OH
  35. Daniel Yu. Randolph MS, Randolph, NJ
  36. Michael Tso. SMU, Victoria, BC, Canada
  37. Sylvia Vassileva. American College of Sofia, Bulgaria

Previous Problems

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