High School Challenge

Week Ending 1-24-99

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

Congratulations to Robert Cooper of Gonzaga High School in Washington, DC. Robert wins the Casio CFX-9850G Color Graphing calculator.

Sum Five

You are given a geometric series in which all terms are positive. The fifth term minus the fourth term is 576. The second term minus the first term is 9. What is the sum of the first five terms of this series?

Correct Solutions:

  1. Wilson Shieh. McNally Composite HS, Edmonton, Alberta, Canada
  2. Andy Eadon. Grissom HS, Huntsville, AL
  3. Frank Kuo. Los Altos HS, La Puente, CA
  4. Sherard Chiu. Grissom HS, Huntsville, AL
  5. Amanda Vicary. Farmington HS, Farmington, IL
  6. Yuri Mihelovich. Riga SS No. 13, Riga, Latvia
  7. Denis Chebikin. Riga SS No. 40, Riga, Latvia
  8. Alexandra Korolyova. Riga SS No. 40, Riga, Latvia
  9. Sorin Ionescu. John Abbott College, Montreal, Canada
  10. Andrew Simpson. Sydney Grammar School, Sydney, NSW, Australia
  11. Josh Looks. Homestudy, Jerusalem, Israel
  12. Nasser Demir. American School of Kuwait, Hawalli, Kuwait
  13. Eric Hoke. Wayland HS, Wayland, MA
  14. Matt Griffin. Pitt Meadows SS, Pitt Meadows, BC, Canada
  15. Lisa Schechner. Manorhaven ES, Port Washington, NY
  16. Ben Tidwell. Grissom HS, Huntsville, AL
  17. Bella Voldman. Brookline HS, Brookline, MA
  18. Vivek Sahani. John P. Stevens HS, Edison, NJ
  19. Jan Nordbotten. Kathedral School. Bergen, Norway
  20. Morgan Chen. Mt. Carmel HS, San Diego, CA
  21. Pradeep Baliga. Central HS, Tuscaloosa, AL
  22. Khem Veasna. Revere HS, Revere, MA
  23. Sindy Lam. Windermere SS, Vancouver, BC, Canada
  24. Craig Spencer, Menomonie HS, Menomonie, WI
  25. Jeffrey Mo. University ES, Calgary, Alberta, Canada
  26. Julie Edwards. Newark Academy, Livingston, NJ
  27. Dorothy Sparks. Oviedo HS, Oviedo, FL
  28. Mary Sparks. Oviedo HS, Oviedo, FL
  29. Jack J. Shen. Earl Haig SS, North York, Toronto, Ontario, Canada
  30. Leslie CY Chan. Langstaff SS, Thornhill, Ontario, Canada
  31. Katrina Spare. St. John JHS, St. John, KS
  32. Jessica Spare. Hudson MS. Hudson, KS
  33. Vivek Jain. Graham HS. Bluefield, VA
  34. Michael Walker. Lincoln Park HS, Chicago, IL
  35. Yiming Yao. Hazen HS, Renton, WA
  36. Xingji Zheng. Abby Senior SS, Abbotsford, BC, Canada
  37. Vivian Tang. Chaparral HS, Temecula, CA
  38. Natalie Ruschak. Oviedo HS, Oviedo, FL
  39. Carla Murphy. Edgewood JHS, Merritt Island, FL
  40. Gershon Bialer. Evanston Township HS, Evanston, IL
  41. Egon Salimusaj. East Hartford HS, East Hartford, CT
  42. Duc Thai. Rostrevor College, Adelaide, South Australia
  43. Joji Ozawa. Irvington HS, Irvington, NY
  44. Fraser McNairn. McNally CHS, Edmonton, Alberta, Canada
  45. Yona Levine. Lehava, Kedumim, Israel
  46. Jeong-Won Kim. Puchon Girls' HS, Puchon, Kyonggi, Korea
  47. Dana Bromenshenkel. Sauk Centre HS, Sauk Centre, MN
  48. Matt Hardy. Merritt Island HS, Merritt Island, FL
  49. Angela Robinson. Merritt Island HS, Merritt Island, FL
  50. Krista Wagner. Merritt Island HS, Merritt Island, FL
  51. Paul Bach. Woodford County HS, Versailles, KY
  52. Robert Cooper. Gonzaga HS, Washington, DC
  53. Bart Robinson. Eagle HS, Eagle, ID
  54. Fawntia Fowler. Sheridan Japanese Program, Sheridan, OR
  55. Stacy Finkbeiner. Center for Arts & Sciences. Saginaw, MI
  56. Bryan Gough, Walkersville HS, Walkersville, MD
  57. Michael Gough, Walkersville HS, Walkersville, MD
  58. Jeff Sims. Sweeny High School, Sweeny, TX
  59. Brendon Hansen. Newport Harbor HS, Newport Beach, CA
  60. Pintu Lohia. Agarwal Vidyalaya & Junior College, Chennai, India
  61. William Chau. East Brunswick HS, East Brunswick, NJ
  62. Laurel Maharaj. Rio Claro HS, Trinidad, West Indies
  63. Ariel Benson. Flatbush HS, Brooklyn, NY
  64. Lisa Gardner. Boyette Springs ES, Riverview, FL
  65. Mellany Sherman. Cusick HS, Cusick, WA
  66. Dan Robinson. Cusick HS, Cusick, WA
  67. Lisa Stover. Arkport Central HS, Arkport, NY
  68. Mocanu Victor. College de Montreal, Montreal, Quebec, Canada
  69. Adam Finkbeiner. Center for Arts & Sciences, Saginaw, MI
  70. Randy Haylor. Keyser HS, Keyser, WV
  71. Joseph Cheng. Stuyvesant HS, New York, NY
  72. Nigel Jalsa. Bishop's HS, Tobago, Trinidad, West Indies
  73. Chen Lin. Mckinley HS, Honolulu, HI
  74. Jason Juang. Sycamore JHS, Cincinnati, OH
  75. Sergey Kahn. Sycamore JHS, Cincinnati, OH
  76. Pretesh Patel. Oviedo HS, Oviedo, FL
  77. Jonathan Campbell. McDougle MS, Chapel Hill, NC
  78. James Sun. Homeschooled, Irwin, PA
  79. Justin Lam. College Park HS, Pleasant Hill, CA
  80. Mandi Buss. First Assembly Christian School, Memphis, TN
  81. Patrick Clements. Spruce Creek HS, Port Orange, FL
  82. Galen Cooper. Advance HS, Advance, MO
  83. Michael Moyer. The Way Home School, Carlisle, PA
  84. Maxim Bushmakin. Lake Park HS, Roselle, IL
  85. Elaine Hart. Mount Rainier HS, Des Moines, WA
  86. Alicia Grattan. Santa Ynez Valley HS, Santa Ynez, CA
  87. Miao Sun. Home School, Irwin, PA
  88. Andy Novocin. Stanton College Prep, Jacksonville, FL
  89. Paul Nichols. Northern CI & VS, Sarnia, ON, Canada
  90. Ajay Kapadia. Oviedo HS, Oviedo, FL
  91. Sanjay Kairam. Horace Mann HS, Riverdale, NY
  92. Trung Lai. James Logan HS, Union City, CA


Previous Problems

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