David Worboys


HEADACHES BY THE NUMBER

I’LL start with a question. A diary and a pencil purchased separately cost €11. The diary costs €10 more than the pencil. How much is the pencil? Easy. Answer at the end. The money required to buy a house for €2,000,000 in cash would require 25 kilometres of €10 notes laid out, end-to-end, along the […]