Rob Eastaway has written at least 14 books. Their most popular book is Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything with 13 saves with an average rating of 4⭐.
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![]() How Long is a Piece of String How Long is a Piece of String
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![]() Maths on the Go Maths on the Go: 101 Fun Ways to Play with Maths
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