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class=\"post-content\" itemprop=\"description\"\u003e\n\u003cp\u003eCyfres o lyfrau yn seiledig ar bosau dyddiol Gareth Ffowc Roberts ar Drydar.\u003c\/p\u003e\n\u003cp\u003eCwestiynau llawn hwyl at ddant pawb ydynt, does dim rhaid bod yn fathemategydd i’w mwynhau na’u datrys!\u003c\/p\u003e\n\u003cp\u003eDewiswch bob llyfr ar wahân, neu’r gyfres lawn, o’r rhestr isod.\u003c\/p\u003e\n\u003cp\u003e--\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eA series of books based on Gareth Ffowc Roberts’ daily puzzles on Twitter. \u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThese are fun puzzles for all tastes; you do not need to be a mathematician to enjoy unravelling them!\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eChoose books individually or the complete set of 3 from the drop-down list below.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eAwdur: Gareth Ffowc Roberts\u003c\/p\u003e\n\u003cp\u003eCyhoeddwr: 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