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THE EVOLUTION OF MATHS PROBLEMS:.
 

1960: A logger sells a truckload of lumber for £100. His cost of production is 4/5 of this price. What is his profit?

1970 (Traditional): A logger sells a truckload of lumber for £100. His cost of production is 4/5 of this price, or in other words, £80. What is his profit?

1970 (New Maths): A logger exchanges a set L of lumber for a set M of money. The cardinality of set M is 100 and each element is worth a pound. Make a square array of 100 dots to represent the elements of set M. The set C of the cost of production contains 20 fewer elements than set M. Represent the set C as a subset of set K and answer the following question: What is the cardinality of set P of profits?

1980: A logger sells a truckload of lumber for £100. His cost of production is £80 and his profit is £20. Your assignment is to underline the number 20.

1990 (Outcomes-based destreamed integrated Maths): By cutting down beautiful forest trees, an environmentally ignorant logger makes a profit of £20. What do you think of this way of making a living? In your group, use role play to determine how the forest birds and squirrels feel.