The Sunday Telegraph - Sunday - - Front Page -

This is a cor­rect ad­di­tion sum. Each digit has been re­placed by a let­ter. One of the dig­its could be zero. Can you de­ci­pher the num­bers in the sum? An­swer at the end of Puz­zles. David Wells’s lat­est book is Games and Math­e­mat­ics: Sub­tle Con­nec­tions (Cam­bridge UP £15.99)

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