text: 1960s arithmetic test:
  
  "A logger cuts and sells a truckload of lumber for $100. His cost of production is four-fifths of that amount. What is his profit?"
  
  '70s new-math test:
  "A logger exchanges a set (L) of lumber for a set (M) of money. The cardinality of Set M is 100. The set C of production costs contains 20 fewer points. What is the cardinality of Set P of profits?"
  
  '80s "dumbed-down" version:
  "A logger cuts and sells a truckload of lumber for $100. Her cost is $80, her profit is $20. Find and circle the number 20."
  
  Current version:
  "An unenlightened logger cuts down a beautiful stand of 100 trees in order to make a $20 profit. Write an essay explaining how you feel about this as a way to make money. Topic for discussion: How did the forest birds and squirrels feel?"