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London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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@Arducius
A place for people to post puzzles to confuse and confound, then impress everyone with your amazing powers of reasoning and deduciton.
Post up your puzzle without an answer, hopefully someone will be able to provide an answer and the reasoning behind it.
First up, an easier one: A lady has two children. One is a boy. What are the chances of the other child also being a boy?
Remember to post your reasoning behind the answer, and no cheating!