@BoltonSch Tweet 14/12/2022 09:10 AM Tweet 14/12/2022 09:10 AM Posted by Bolton School on 14 Dec 2022 Modified by Bolton School on 07 Sep 2023 @BoltonSch GCHQChristmasChallenge RT @BSGDMathematics: The Showbie assignment is now open… #GCHQChristmasChallenge twitter.com/BSGDMaths/stat…