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Problem of the Week

Chess Anyone - February 08, 2010

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How many rectangles of any size are on an 8 x 8 checker board?

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47% of the submitted answers were correct. (176 out of 377)
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Correct answers have been submitted by:

  1. Janson Ng. Singapore International School, Hong Kong, Hong Kong
  2. Sean Belisle. Midland Middle School, Midland, GA USA
  3. Simon Chong. Columbus High School, Columbus, GA USA
  4. Stephen Ng. Hong Kong International School, Hong Kong, Hong Kong
  5. Nikhil Patel. Columbus High School, Columbus, GA USA
  6. Wai Ho Leung. Gabrielino High School, San Gabriel, CA USA
  7. Cesar Santil. O & M University, Santo Domingo, Dominican Republic
  8. Storie Atkins. Columbus High School, Midland, GA USA
  9. Isaac Park. Johnson School, Cherry Hill, NJ USA
  10. David Ren. Columbus High, Columbus, GA USA
  11. Dennis Xu. Richards Middle School, Columbus, GA USA
  12. Jerome Cherry. Mundare, Canada
  13. Yuliya Nesterova. Colonel By S.s., Ottawa, Canada
  14. Mihir Singhal. Encinal Elementary School, Menlo Park, CA USA
  15. Wenlin Fan. Moorestown, NJ USA
  16. Cees Otto. School, Oegstgeest, Netherlands
  17. Alice Nguyen 9l. Abc International School, Ho Chi Minh City, Vietnam
  18. Frank Mc Gartland. Saskatoon, Canada
  19. Farid Lian. Atlantic University, Barranquilla, Colombia
  20. Albert Tang. Welby Way, Los Angeles, CA USA
  21. Vignesh Varadarajan. Mission Valley Elementary, Fremont, CA USA
  22. Katie Tuday. Carteret High School, Carteret, NJ USA
  23. Crispin Pereira. University Of Toronto, Toronto, Canada
  24. Amogh Gaitonde. Don Callejon, Santa Clara, CA USA
  25. Ariel Tynan. Sonoran Sky, Phoenix, AZ USA
  26. Richard Levine. Clearwater, FL USA
  27. Allison Mann. Chelmsford High School, Chelmsford, MA USA
  28. Terry Li. Hugh McRoberts Secondary School , Richmond,b.c., Canada
  29. Chris Evert. , Sugar Land, TX USA
  30. Bar Greengrass. Lapid School, Hod Hasaron, Israel
  31. Albert Chung. Southridge School, White Rock, Canada
  32. Taek Jin Kim. Abc International School, 8m, Ho Chi Minh City, Vietnam
  33. Sian Wun Kuo. Taipei County Yong Ho Junior High School, Taipei, Taiwan
  34. Frans Janssen. Nijmegen, Netherlands
  35. Gent Gjika. Turgut Ozal College Of Tirana, Tirana, Albania
  36. John Snyder. , Oconomowoc, WV USA
  37. Ryan Uppal. Nsss, Surrey, Cameroon
  38. Siddharth Bud. Apj, Mumbai, India
  39. Steven Ferry. Noni, Chengdu, China
  40. Bryan Chu. Hong Kong International School, Hong Kong, Hong Kong
  41. Sanjay Godse. , Pune, India
  42. Joselito Torculas. Adamson University, Las Piñas, Philippines
  43. Anneleen Van Geenhoven. Ua, Antwerp, Belgium
  44. Sy Kim. Ism, Manila, Philippines
  45. Tim Ginting. Ism, Manila, Philippines
  46. Sang Hyun Ma. Ism, Manila, Philippines
  47. Bole Zhu. Kas, Beijing, China
  48. Jaren Sta Maria. Concord Primary School, Singapore, Singapore
  49. Xianli Fu. Khartoum American School, Puyang, Henan, China
  50. Sunil Pradhan. School, Mumbai, India
  51. Dinesh Nayak. , Mangalore, India
  52. Joe Neumann. Washington Township High School, Sewell, NJ USA
  53. Judy Pennington-price. Jackson County High School, Annville, KY USA
  54. Edward Freeman. Uconn, West Hartford, CT USA
  55. Lee Newsome. Freedom High, Kissimmee, FL USA
  56. Jansen Jarret Sta Maria. Raffles Instituition, Singapore, Singapore
  57. Terry Field. Covington High School, Covington, IN USA
  58. Archis Bhandarkar. Nysmith School, Potmac Falls, VA USA
  59. Graham Gilbert. Retired Teacher, Haddon Hts, NJ USA
  60. Peter Phipps. None, Worcester, United Kingdom
  61. Peter Lin. , Tallahassee, FL USA
  62. Eric Mañalac. International School Manila, Makati City, Philippines
  63. Joshua Epperson. Sims, Augusta, GA USA
  64. Edward She. Stallings Island Middle School, Martinez, GA USA
  65. Gerry Meixiong. Stallings Island Middle School, Evans, GA USA
  66. Eilam Shapira. Ofek School, Modiin, Israel
  67. Joshua Ani. Montgomery Elementary School, Atlanta, GA USA
  68. William Cunningham. Columbus High School, Columbus, GA USA
  69. Kevin Lee. Cherry Hill West High School, Cherry Hill, NJ USA
  70. James Hart. Coastal Carolina Community College, Jacksonville, NC USA
  71. Tehzeeb Kajani. Windy Ridge, Orlando, FL USA
  72. Alan Jones. Retired, Daventry, United Kingdom
  73. Vince Riddle. Nature Hill Itnermedit, Oconomowoc, WI USA
  74. Maaike Van Der Plas. Rijnlands Lyceum, Oegstgeest, Katwijk Aan Zee, Netherlands
  75. Dani Chavez. Creekwood Middle School!, Kingwood, TX USA
  76. Mike Schieffer. , Austin, TX USA
  77. Matt Wilner. Walled Lake Northern, Commerce Twp., MI USA
  78. Katie Powell. None, Mckee, KY USA
  79. Mark Adams. Motorola, Hoschton, GA USA
  80. Alva Welch. Lenoir Community College, Snow Hill, NC USA
  81. Anoop Desai. Windy Ridge School, Orlando, FL USA
  82. Emily Dougelus. Bryan High, Bryan, TX USA
  83. Casey Nosiglia. South Salem High School, Salem, OR USA
  84. Richard Eilbert. L-3 Comm, Lincoln, MA USA
  85. Andrew Mowrey. Mayde Creek, Katy, TX USA
  86. Ian Moore. Colorado School Of Mines, Boulder, CO USA
  87. Jianlin Wang. Xom, Sugar Land, TX USA
  88. Jim Stein. Bunnell H.s., Stratford, CT USA
  89. Hal Keene. St. Cloud Hs, Orlando, FL USA
  90. Neha Kumar. Sms, Memphis, TN USA
  91. Travis Xiang. Casselberry Elementary, Casselberry, FL USA
  92. Vernick Bashi. Walled Lake Northern High School, Commerce Township, MI USA
  93. L. Zhou. Middle, Parsippany, NJ USA
  94. Zacque Browne. Wln, Commerce, MI USA
  95. Kyle Thomas. Walled Lake Northern, Commerce, MI USA
  96. Александар Богатинов. СУГС „Георги Димитров“, Скопје, Macedonia
  97. Pastor Greg Ciesluk. The United Methodist Church, Pequot Lakes, MN USA
  98. Carly Burton. Walled Lake Northern, Commerce, MI USA
  99. Mark Enderich. , Plymouth, MI USA
  100. Stephen Bidwell. School, Elgin, SC USA
  101. Rui Guo. Na, Lawrence, KS USA
  102. Maja Gross. Ps 112, New York, NY USA
  103. Maja Gross. Ps 112, New York, NY USA
  104. Thomas Darby. Windy Ridge K-8, Orlando, FL USA
  105. Jasmine Ly. Windy Ridge K-8, Orlando, FL USA
  106. Mathew Chethimattom. , Columbus, GA USA
  107. Sarah Hellman. University Of Louisville, Louisville, KY USA
  108. Douglas Hauser. Biomedical Research At Usc, Los Angeles, CA USA
  109. Stefan Van Til. Rijnlands Lyceum Oegstgeest, Rijnsburg, Netherlands
  110. Basil Kilisav. Qvi, Rochester, NY USA
  111. Mara Rubin. Wln, White Lake, MI USA
  112. Rachel Castiglione. Walled Lake Northern High School, West Bloomfield, MI USA
  113. Ciara Vance. Brookstone, Columbus, GA USA
  114. Jurriën Is Een Amateur. Rijnlands Lyceum Oegstgeest, Rijnsburg, Netherlands
  115. Jean-guy Smith. , Sorel-tracy, Qc, Canada
  116. Mike Hilst. , Spring Lake Park, MN USA
  117. Amar Patel. Sherwood Githens Middle School, Durham, NC USA
  118. Pat Costello. Eku, Richmond, KY USA
  119. Johnny Kang. Cherry Hill West, Cherry Hill, NJ USA
  120. Kavin Nithi. Wayne Valley, Wayne, NJ USA
  121. Nathalie Deloach. Richards Middle School, Columbus, GA USA
  122. Sang Yun Kim. Stonewall Jackson High School, Nokesville, VA USA
  123. Timothy Kennedy. Brookstone School, Columbus, GA USA
  124. Christine Konicki. Walled Lake Northern High School, Commerce Township, MI USA
  125. Anuragh Gudur. Blackmon Road Middle School, Columbus, GA USA
  126. Steven Rogers. Washington County Community College, Calais, ME USA
  127. Jong Jung. Montford, Tallahassee, FL USA
  128. Siva Venkatachalam. Columbus High School, Columbus, GA USA
  129. ***andrew Adorno***. Cherry Hill High School West, Cherry Hill, NJ USA
  130. Sara Lips. Richards Middle School, Columbus, GA USA
  131. Julio Guerra. Uni, Lima, Peru
  132. Christine Nguyen. Cherry Hill High School West, Cherry Hill, NJ USA
  133. Suvitha Radhakrishnan. Columbus High School, Columbus, GA USA
  134. Akash Mathew. Columbus High School, Columbus, GA USA
  135. Perry Kulmatyski. R.f. Staples, Westlock, Canada
  136. Karan Agrawal. Worthington Park Elementary, Columbus, OH USA
  137. Wendy Cheng. Cherry Hill West, Cherry Hill, NJ USA
  138. Deborah Postma. Columbus High School, Columbus, GA USA
  139. Kaitlyn Kinney. Walled Lake Northern High School, Commerce, MI USA
  140. Alec Sun. Florence Sawyer School, Bolton, MA USA
  141. Katy Jinkins. Hird Academy, Rewey, WI USA
  142. Arielle Marmito. Blackmon Road Middle School, Columbus, GA USA
  143. Alicia De León-sotelo Y Vidosa. Colegio Marista Colon, Huelva, Spain
  144. Shaun Lising. Cherry Hill West High School, Cherry Hill, USA
  145. Matthew Ilejay. Tesoro Del Valle Elementary, Valencia, CA USA
  146. Mitchell Renteria. High School West, Cherry Hill, NJ USA
  147. Nolan Concha. Mariano Marcos State University, Laoag City, Philippines
  148. Daniel Murashov. Nrms, North Royalton, OH USA
  149. Regan Parmentier. Walled Lake Northerm, Commerce, MI USA
  150. Ed Wern. , Monticello, MN USA
  151. Audrey Mayer. Mesa Union School , Somis, CA USA
  152. Justin Zhong. C.m. Rice Middle School, Plano, TX USA
  153. Diane Bui. Welby Way, Canoga Park, CA USA
  154. Evelyn Chua. Southridge, Surrey, Canada
  155. Emily Ling. N/a, Naperville, IL USA
  156. Crystal Wang. Jfk Middle School, Port Jefferson Station, NY USA
  157. Paula A. Gloucester High School, Ottawa, On, Canada
  158. Tri Dinh. Cherry Hill West, Cherry Hill, NJ USA
  159. Jeffrey Ng. Cherry Hill West High School, Cherry Hill, NJ USA
  160. David Lichtenberger. Cherry Hill West, Cherry Hill, NJ USA
  161. Rishi Kant Brahmpuria. Maulana Azad National Institute Of Technology, Bhopal, India
  162. Max Li. Gloucester High School, Ottawa, Canada
  163. Mudit Agarwal. School, Roorkee, India
  164. J Dice. Mgs, Danville, IL USA
  165. Elaine Smith. Dornoch Academy, Dornoch, United Kingdom
  166. Scot Millhollen. Interlake High School, Bellevue, WA USA
  167. Arnab S. Birchland Park, East Longmeadow, MA USA
  168. Sara Waters. Centennial Elementary, Plano, TX USA
  169. Meera Gopal. Business, Bridgewater, NJ USA
  170. Tiger Gao. Worthington Park, Columbus, OH USA
  171. C Vannetta. Ingenuity Project, Baltimore, MD USA
  172. Taylor Schram. R.f.staples, Westlock, Canada
  173. Bryce Hughes. R.f. Staples, Westlock, Canada
  174. Deanne Tyler. R.f. Staples Secondary School, Westlock, Canada
  175. Daniel Durand. R.f.staples, Westlock, Canada
  176. Amanda Ozawa. Mesa Union School, Somis, CA USA

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