High School Challenge

Week Ending 3/12/00

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

Congratulations to Andrew Evans from Mar Vista Elementary School in Aptos, CA. Andrew wins the Casio CFX-9850G Color Graphing calculator.

The Subtraction Problem

You enter a classroom and see 120 - 22 = 21 and the teacher has written "Absolutely Correct" on the board beside the problem. How can that be?

Please use the following format for your information when responding:

<LI> Your Name. Your ES, MS, or HS, Town, State (2 letter)
Your Grade

Problem answer


Use our On-Line Calculator to solve the problem.

Correct Solutions:

  1. Peter Zhang. Governor's School For Science and Math, Hartsville, SC
  2. Bryce Howard. Governor's School For Science and Math, Hartsville, SC
  3. Adam Weaver. Governor's School For Science and Math, Hartsville, SC
  4. Andrew Evans, Mar Vista ES, Aptos, CA
  5. Erin Harness. Upper Lake HS, Upper Lake, CA
  6. Ritchie Hok. Sisler HS, Winnipeg, MB, Canada
  7. Jongmin Baek, Hyde MS, Cupertino, CA
  8. Simon Rubinstein-Salzedo. Homestead HS, Cupertino, CA
  9. Victor Putra Lesmana. Canisius College, Jakarta, Indonesia
  10. Sorin Ionescu. John Abott, Montreal, QB, Canada
  11. Gwen Lawson. Westside MS, Omaha NE
  12. Mark Bicket. North HS, Edmond, OK
  13. Kevin Chan. Seminole HS, Sanford, FL
  14. Sibo Zhao. Amador Valley HS, Pleasanton, CA
  15. Akshay Singal. Blacksburg MS, Blacksburg, VA
  16. Aleksandra Korolova. Riga SS No. 40, Riga, Latvia
  17. Juri Mihelovich. Riga SS No 10, Riga, Latvia
  18. Igor Gorbovitskiy. Riga SS No. 40, Riga, Latvia
  19. Kimi Parker. Madeira HS, Madeira, OH
  20. Stephen Schmitt. Bayside MS, Bayside, WI
  21. Michael Guzik. The Guzik Home Learning Center, San Diego, CA
  22. Jan Nordbotten. Cathedral School, Bergen, Norway
  23. Chris Mann. James Ruse AHS, Carlingford, NSW, Australia
  24. Xi Wang. Kelvin HS, Winnipeg, MB, Canada
  25. Maiyuran Arumugam. James Ruse AHS, Carlingford, NSW, Australia
  26. Elena Udovina. Agnon MS, Beachwood, OH
  27. Katie Santilli. Bishop Kenny HS, Jacksonville, FL
  28. Britta Lundin. Astoria HS, Astoria, OR
  29. Grace Yeh. Hugh McRoberts SS, Richmond, BC, Canada
  30. Dennis Macie. Home School, Oconomowoc, WI
  31. Jason Lo. Twin Peaks MS, Poway, CA
  32. Mark Blease. Alvirne HS, Hudson, NH
  33. Elias Daher. Sin-El-Fil HS, Beirut, Lebanon
  34. David Howie. Cheadle Hulme College, Manchester, UK
  35. Matthew Buchalter. Thornlea SS, Thornhill, ON, Canada
  36. Johnathan Chung. Barrington HS, Barrington, IL
  37. Karl Spurzem. Westside MS, Omaha, NE
  38. Robin Imray. Bishop Kenny HS, Jacksonville, FL
  39. Danny Wong. James Ruse AHS, Carlingford, NSW, Australia
  40. Luke Elder. Southridge IS, Surrey, BC, Canada
  41. Eric Anthony. Tulare Union HS, Tulare, CA
  42. Taya Feldman. Classical HS, Providence, RI
  43. Amol Saincher. Southridge School, Surrey, BC, Canada
  44. Brandon Nsekpong. W L Cabell ES, Dallas, TX
  45. Danny Panzer. Yeshivah of Flatbush, Brooklyn, NY
  46. Chris West. Mariner HS, Cape Coral, FL
  47. Joshua Powell. Marietta HS, Marietta, GA
  48. Edward Lee Tun Hang. Buddhist Wong Fung Ling College, Hong Kong
  49. Yiming Yao. New Westminster SS, New Westminster, BC, Canada
  50. Ritwik Chaudhuri. Patha Bhavana, Santiniketan, West Bengal, India
  51. Mun Yuk Ko. United World College of the Atlantic, Llantwit Major, UK
  52. Shira Stern. Yeshiva of Greater Washington, Silver Spring, MD
  53. Erik Tylczak. South Albany HS, Albany, OR
  54. Chee Sing Lee. South Albany HS, Albany, OR
  55. Jennifer Serpa. South Albany HS, Albany, OR
  56. Jayme Kaddatz. Fox Valley Lutheran HS, Appleton, WI
  57. Asher Walkover. Rambam Mesivta, Lawrence, NY
  58. Tao Chen. Miller MS, San Jose, CA
  59. Pradeep Baliga. Central HS, Tuscaloosa, AL
  60. Rina Kim. Walt Whitman HS, Bethesda, MD
  61. Raju Krishnamoorthy. Cupertino MS, Cupertino, CA
  62. Chandra Clarke. Cranbrook HS, Bloomfield Hills, MI
  63. Heather Van Der Hoop. Hugh McRoberts SS, Richmond, BC, Canada
  64. Pauline Lo. Hugh McRoberts SS, Richmond, BC, Canada
  65. Mike Munson. Newport Harbor HS, Newport Beach, CA
  66. Samuel Timothy Dy. St Stephen's HS, Manila, Philippines
  67. Atorn Nu. Suteetorn MS, Nakhonpathom, Thailand
  68. Eric Lawson. Swanson ES, Omaha, NE
  69. Amy Rigdon. Oviedo HS, Oviedo, FL
  70. John-Paul Ledford. Suwannee HS, Live Oak, FL
  71. Connie Oh. Hayfield SS, Alexandria, VA
  72. Brande Guzak. Bishop Kenny HS, Jacksonville, FL
  73. Rusty Newman. Bishop Kenny HS, Jacksonville, FL
  74. Anton Sova. Battery Creek HS, Beaufort, SC
  75. Jack Williard. Wesleyan Academy, High Point, NC
  76. Chris Davis. Memorial HS, Madison, WI
  77. Amit Lakhanpal. University HS, Irvine, CA
  78. Floyd Newberry. Central Mountain HS, Mill Hall, PA
  79. Rares Trocan. Galena HS, Reno, NV
  80. Sierra Hedberg. Montgomery MS, El Cajon, CA
  81. Bonnie Huang. Albany HS, Albany, CA
  82. Irena Penev. Mathematical HS, Belgrade, Yugoslavia
  83. Monique Mills. Louisa County HS, Mineral, VA
  84. Chris Cheely. Louisa County HS, Mineral, VA
  85. Katie Kane. Louisa County HS, Mineral, VA
  86. Benoit Duhaime. Séminaire Saint-Joseph, Trois-Rivières, QB, Canada
  87. Jeff Hopkins. Japanese Program, Sheridan, OR
  88. Andrey Mamontov. Reedsburg HS, Reedsburg, WI
  89. Yana Malysheva. Urbana HS, Urbana, IL
  90. Anton Malyshev. Home School, Urbana, IL
  91. Brian Whitley. Pleasanton MS, Pleasanton, CA
  92. Omar Visram. Southridge School, Surrey, BC, Canada
  93. Danny Beer. Yeshiva of Flatbush HS, Brooklyn, NY
  94. Robbie Samstein. Yeshiva of Flatbush HS, Brooklyn, NY
  95. Liyang Chen. Pullman HS, Pullman, WA
  96. Cameron Leatham. Curtis HS, University Place, WA
  97. Justin Platt. Glenbrook South HS, Glenview, IL
  98. Robbie Lane. Louisa County HS, Mineral, VA
  99. Daniel Coyle. Msgr Donovan HS, Toms River, NJ
  100. Robert Hunter. St Bernadette School, Silver Spring, MD
  101. Tanya Murdock. Atlantic Co Vo Tech, Mays Landing, NJ
  102. Brandy Bing. Bishop Kenny HS, Jacksonville, FL
  103. Steve Fatcher. Atlantic Co Vo Tech, Mays Landing, NJ
  104. Mike Muszynski. Lake Brantley HS, Altamonte Springs, FL
  105. Rachel Hunter. St Bernadette School, Silver Spring, MD
  106. Thomas Szczarkowski. Montessori Academy, Nashville, TN
  107. Anthony Yuen. Hugh McRoberts SS, Richmond, BC, Canada
  108. Rohan Mathew. Sycamore JHS, Cincinnati, OH
  109. Trish Melin. Merritt Island HS, Merritt Island, FL
  110. Francis de la Cerna. Maine East HS, Park Ridge, IL
  111. Bjorn Fenwick. Moscow JHS, Moscow, ID


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