possible related topics estimation
This is a typical/classic Fermi question (see www.physics.uwo.ca/science_olympics/events/puzzles/fermi_questions.html). Learners will have to think about the shoes that are not on display – the ones kept ‘out the back’ – and also hoarders who have hundreds of pairs of shoes even though they have only one pair of feet!
www.mathematicalbeginnings.com
© Colin Foster 2012, www.foster77.co.uk