### The Evolution of Word Problems

Author/date unknown...

**1950, the old math...**

A logger sells a truckload of lumber for $100. His cost of production is four-fifths of the price. What is his profit?

**1960, the old math wanes...**

A logger sells a truckload of lumber for $100. His cost of production is four-fifths of the price, or $80. What is his profit?

**1970, the new math...**

A logger exhanges a set "L" of lumber for a set "M" of money. The cardinality of set "M" is 100, and each element is worth $1. Make 100 dots representing the elements of the set "M". The set "C" of the costs of production contains 20 fewer points than set "M". Represent the set "C" as a subset of "M", and answer the following question What is the cardinality of the set "P" of profits?

**1980, leveling the playing field...**

A logger sells a truckload of lumber for $100. His cost of production is $80, and his profit is $20. Your assignment: underline the number 20.

**1990, outcome-based education...**

By cutting down beautiful forest trees, a logger makes $20. What do you think of the this way of making a living? (Topic for class participation How did the forest birds and squirrels feel?)

**1997, profit-driven education...**

By laying off 40% of the its loggers, a company improves its stock price from $80 to $100. How much capital gain per share does the CEO make by exercising his stock options at $80? Assume capital gains are no longer taxed, because Republicans feel this encourages investment.