This is an interactive applet game exercises a student's factoring ability. A student can play against the computer or against a friend on grids containing the numbers 1-30, 1-49, or 1-100. Each player in turn chooses a number from the board, and then the opponent claims all of its remaining proper factors. A player's score is the sum of all the numbers and factors she/he has chosen. When there are no numbers remaining with unclaimed factors, the game ends and the player with the greater total is the winner.


  • Mathematics > General
  • Education > General

Education Levels:

  • Grade 1
  • Grade 2
  • Grade 3
  • Grade 4
  • Grade 5
  • Grade 6
  • Grade 7
  • Grade 8
  • Grade 9
  • Grade 10
  • Grade 11
  • Grade 12


Grade 3,Grade 6,NSDL,Grade 4,Factors,Mathematics,Number concepts,Social Sciences,Arithmetic,Analyze and persevere,Division,Number and operations,Upper Elementary,Grade 5,Multiplication,Composition and decomposition of numbers,Informal Education,Whole numbers,Middle School,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Comparison of numbers,Practice Standards,Life Science,Elementary School,oai:nsdl.org:2200/20140728160523179T,Strategies,Chemistry,Operations,Mental calculation,Reason quantitatively,Problem solving,Process skills,Education



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