Teaching Maths
1. Teaching Match in 1970
A logger sells a lorry load of timber for £1000.
His cost of production is 4/5 of the selling price.
What is his profit?
2. Teaching Maths In 1980
A logger sells a lorry load of timber for £1000.
His cost o production is 4/5 of the selling price, or £800.
What is his profit?
3. Teaching Maths In 1990
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