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MathsAppeal on Twitter: "Today, July 22 can be written as 22/7, which is an approx. of Pi so... 🎉Happy Pi Approximation Day!🎉 To celebrate @mathsappeal co-hosts @Bobby_Seagull & @DoTheMathsThing set the @BBCr4today #
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Today Programme Puzzle Book: The puzzle book of 2018 by BBC (Paperback, 2018) for sale online | eBay
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Today Programme Puzzle Book 2: The puzzle book of 2019: Over 250 brainteasers from the land, sea and ice: Amazon.co.uk: BBc: 9781788400657: Books
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