[ Aaargh! ]
1. Teaching Math In 1950s
A logger sells a truckload of lumber for $100. His cost of production is 4/5 of the price. What is his profit?
2. Teaching Math In 1960s
A logger sells a truckload of lumber for $100. His cost of production is 4/5 of the price, or $80. What is his profit?
3. Teaching Math In 1970s
A logger sells a truckload of lumber for $100. His cost of production is $80. Did he make a profit?
Read the whole thing, it goes on to do the 80's, 90's, and 00's too. Painfully true, I'm afraid.
It goes on to do the 80's, 90's, and 00's too.
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