View: Text-Only | Mobile

 

 pow-image

Home Base

plate

In the year 1985, the date April 25th had a unique property.  When the date was written as 4-25-1985, the number for the month and day, 425, could actually equal the year 1985. In other words, in what number base does 425 equal 1985 in base 10?

April 25, 2005
Past Problems  
pencil

E-mail Solutions to: pow@umassd.edu

   
  Correct Solutions 
 
  1. Geroom Fierens. Bornem, Belgium
  2. Patrick McHenry. Gloucester City Schools, Gloucester, MA
  3. Adrian Atanasiu. Bucharest University, Romania
  4. Roland Vyncke. Brugge, Belgium
  5. Roger Steffens. Atlanta, GA
  6. Radu Ionescu. Montreal, Canada
  7. Tim Poe. Austin, TX
  8. Gustavo Niemeyer. Conectiva, Brasil
  9. Lisa Schechner. Schreiber High School, Port Washington, NY
  10. Mark Wintczak. Naperville, IL
  11. Frank McGartland. Saskatoon, SK., Canada
  12. Aristides Kyriakakis.  Thessaloniki.  Greece
  13. Jerrold Greenberg. New York, NY
  14. Luan Luu. CSU Long Beach, Garden Grove, CA
  15. Bob Mitchell. Normal, IL
  16. Mr. Almeida. Lawrence Junior High, Falmouth, MA
  17. Brian Hetrick. UNH, Manchester, NH
  18. Jing Liu. Dartmouth High School, Dartmouth, MA
  19. Charles Green. Miami Lakes Educational Center, Miami Lakes, FL
  20. David Shi. JLS Middle, Palo Alto, CA
  21. Jing Min Liu. Dartmouth High School, Dartmouth, MA
  22. Rebecca Lee. Dartmouth Middle School, Dartmouth, MA.
  23. Allamanis Miltiadis. Anatolia High School, Thessaloniki, Greece
  24. Mr. McNally. Carusi Middle School, Cherry Hill, NJ
  25. Sarah Chen. Marie Curie Middle School, Bayside, NY
  26. Diane Kristiansen. Westwood College, Dallas, TX
  27. Evan Durant. Dartmouth High School, Dartmouth, MA
  28. Murat Konuk. Elkins High School, Houston, TX
  29. Jerome Cherry. NAIT. Edmonton, Alberta, Canada
  30. David Wang. Don Mills C.I., Toronto, ON, Canada
  31. Alfonso Alba. WestWood College, Dallas, TX
  32. Nikita Kitaev. South Pasadena Middle School, South Pasadena, CA
  33. Cindy Sung. Duchesne Academy, Houston, TX
  34. Bar Greengrass. Lapid school, Israel
  35. Klemen Kovacic. OSZO, Kocevje, Slovenia
  36. Vlaicu Crisan. University Babes-Bolyai, Cluj-Napoca, Romania
  37. Mark Enderich. Lear Corp., Dearborn, MI
  38. Mike Osterfoss. Colorado School of Mines, Golden, CO
  39. Rohit Bollineni. Power Middle School, Farmington Hills, MI
  40. Norman Peng. Lowell High School, San Francisco, CA
  41. Tim Yales. Westland, MI
  42. Bill Croughan. Episcopal School of Acadiana, Cade, LA
  43. Jason Tripp. Westside High School, Macon, GA
  44. Rodney Clingaman. Fishers, IN
  45. Abhijeet Mumbai, Rai University, India
  46. Renita Tinsley. Westwood College, Dallas, TX
  47. Tanvi Rastogi. Bridgewater-Raritan High School, Bridgewater, NJ.
  48. Ali Chavez. Creekwood Middle School, Kingwood, TX
  49. Debra Sodie. Westwood College, Dallas, TX
  50. Peter Schaffer. Budapest University of Technology and Economics, Budapest,
    Hungary
  51. Ivan Pyzow. South Pasadena Middle School, South Pasadena, CA
  52. Ms. Rothermel. Rye Junior High School, Rye, NH
  53. Reno. Lawrence Junior High School, Falmouth, MA
  54. Marshall Carpenter.  Fairview High School, Boulder, CO
  55. Michael Reed. Westwood College, Dallas, TX
  56. Ashley Carter. Westwood College Dallas, TX
  57. Randy Lomas. Harvest Park Middle School Teacher, Pleasanton, CA
  58. Patrick Ream. Carusi, Cherry Hill, NJ
  59. Alex McIntire. Brookstone School Columbus, GA
  60. Haley Lewandowski. Fern Hill Elementary School, West Chester, PA
  61. Michael Dennis.Westwood College of Technology Dallas, Dallas, TX
  62. Sonny Fuller. South Shelby High School, Shelbina, MO
  63. Tenshia White.Westwood College, Dallas, TX
  64. Alex Timmler. Wauwatosa East High School, WI
  65. Eileen Zhu. Kearny, NJ
  66. Samantha Grey. Creekwood Middle School, Kingwood, TX
  67. David Fitt. Creekwood Middle School, Kingwood, TX
  68. David Friedman. Sippican Elementary School, Marion, MA
  69. Brian Napier.
  70. Kyle Priver. South Pasadena Middle School, South Pasadena, CA
  71. Aaron Irvin. Westwood College, Dallas, TX
  72. Shareef Bacchus. Hilsman Middle School
  73. Moogra Aakash. Jane Moogra School, WA
  74. Julie Yuqing Ye. Baerums Verk School, Norway
  75. Deyan Simeonov. Math School, Bourgas, Bulgaria
  76. Edmundo Veiga. Rio de Janeiro, Brazil
  77. Gordon Bockus. Wilburton High School, Wilburton, OK
  78. Zhen Shi. Windsor, ON, Canada
  79. Brian Chan. Summit Middle Schoool, Coquitlam, B.C. Canada
  80. Mohsen Taghizadeh. Amirkabir University of Technology, Iran
  44% of respondents successfully answered this problem.


 



 Last Updated On: 11/16/05

Contact Info:

Email: webdevelopment@umassd.edu - UMass Dartmouth Web Development Team