Ian Duff


A retired mathematics lecturer, I've long had an interest in devising short problems not requiring anything beyond clear thought and basic mathematics for their solution. Over my working life and beyond, I've assembled two large folders of miscellaneous topics and techniques, a fruitful source of such problems.

On a more sombre note, since retirement I've produced a website commemorating the loss of a family member in northern France towards the end of WWII.

Where to find Ian Duff online


More Than 200 Recreational Mathematics Problems
Price: $2.99 USD. Words: 31,760. Language: English. Published: May 13, 2017. Categories: Nonfiction » Entertainment » Games, puzzles, & brain twisters
There are 274 short problems requiring no more mathematics than basic algebra, geometry, trigonometry, probability, elementary differentiation and equations of motion under constant acceleration.

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