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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: Gomer\u003c\/p\u003e\n\u003cp\u003eDyddiad: 2013-16\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cform class=\"variations_form cart\" method=\"post\" enctype=\"multipart\/form-data\" data-product_id=\"20234\" data-product_variations='[{\"attributes\":{\"attribute_pa_posau-pum-munud\":\"posau-pum-munud-3\"},\"availability_html\":\"\",\"backorders_allowed\":false,\"dimensions\":{\"length\":\"\",\"width\":\"\",\"height\":\"\"},\"dimensions_html\":\"N\\\/A\",\"display_price\":4.9900000000000002,\"display_regular_price\":4.9900000000000002,\"image\":{\"title\":\"img_3115\",\"caption\":\"\",\"url\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3115.jpg\",\"alt\":\"\",\"src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3115-500x500.jpg\",\"srcset\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3115.jpg 500w, 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class=\\\"price\\\"\u0026gt;\u0026lt;span class=\\\"woocommerce-Price-amount amount\\\"\u0026gt;\u0026lt;span class=\\\"woocommerce-Price-currencySymbol\\\"\u0026gt;£\u0026lt;\\\/span\u0026gt;4.99\u0026lt;\\\/span\u0026gt;\u0026lt;\\\/span\u0026gt;\",\"sku\":\"\",\"variation_description\":\"\u0026lt;p\u0026gt;Y trydydd llyfr posau maths yn y gyfres, a gyhoeddwyd yn 2016. Trefnir y posau yn \\u00f4l dyddiad a lefel, yn mynd yn fwy anodd wrth fynd trwy\\u2019r llyfr. Ceir yr atebion yng nghefn y llyfr.\u0026lt;\\\/p\u0026gt;\\n\",\"variation_id\":20239,\"variation_is_active\":true,\"variation_is_visible\":true,\"weight\":\"\",\"weight_html\":\"N\\\/A\"},{\"attributes\":{\"attribute_pa_posau-pum-munud\":\"posau-pum-munud-2\"},\"availability_html\":\"\",\"backorders_allowed\":false,\"dimensions\":{\"length\":\"\",\"width\":\"\",\"height\":\"\"},\"dimensions_html\":\"N\\\/A\",\"display_price\":4.9900000000000002,\"display_regular_price\":4.9900000000000002,\"image\":{\"title\":\"img_3113\",\"caption\":\"\",\"url\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3113.jpg\",\"alt\":\"\",\"src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3113-500x500.jpg\",\"srcset\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3113.jpg 500w, https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3113-213x213.jpg 213w, https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3113-100x100.jpg 100w\",\"sizes\":\"(max-width: 500px) 100vw, 500px\",\"full_src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3113.jpg\",\"full_src_w\":500,\"full_src_h\":500,\"gallery_thumbnail_src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3113-100x100.jpg\",\"gallery_thumbnail_src_w\":100,\"gallery_thumbnail_src_h\":100,\"thumb_src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3113-213x213.jpg\",\"thumb_src_w\":213,\"thumb_src_h\":213,\"src_w\":500,\"src_h\":500},\"image_id\":\"15938\",\"is_downloadable\":false,\"is_in_stock\":true,\"is_purchasable\":true,\"is_sold_individually\":\"no\",\"is_virtual\":false,\"max_qty\":\"\",\"min_qty\":1,\"price_html\":\"\u0026lt;span class=\\\"price\\\"\u0026gt;\u0026lt;span class=\\\"woocommerce-Price-amount amount\\\"\u0026gt;\u0026lt;span class=\\\"woocommerce-Price-currencySymbol\\\"\u0026gt;£\u0026lt;\\\/span\u0026gt;4.99\u0026lt;\\\/span\u0026gt;\u0026lt;\\\/span\u0026gt;\",\"sku\":\"\",\"variation_description\":\"\u0026lt;p\u0026gt;Yr ail lyfr posau maths yn y gyfres, a gyhoeddwyd yn 2014. Trefnir y posau yn \\u00f4l dyddiad a cheir yr atebion yng nghefn y llyfr.\u0026lt;\\\/p\u0026gt;\\n\",\"variation_id\":20238,\"variation_is_active\":true,\"variation_is_visible\":true,\"weight\":\"\",\"weight_html\":\"N\\\/A\"},{\"attributes\":{\"attribute_pa_posau-pum-munud\":\"cyfres-posau-pum-munud\"},\"availability_html\":\"\",\"backorders_allowed\":false,\"dimensions\":{\"length\":\"\",\"width\":\"\",\"height\":\"\"},\"dimensions_html\":\"N\\\/A\",\"display_price\":13.99,\"display_regular_price\":13.99,\"image\":{\"title\":\"IMG_6300\",\"caption\":\"\",\"url\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2018\\\/03\\\/IMG_6300.jpg\",\"alt\":\"\",\"src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2018\\\/03\\\/IMG_6300-500x500.jpg\",\"srcset\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2018\\\/03\\\/IMG_6300-500x500.jpg 500w, https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2018\\\/03\\\/IMG_6300-213x213.jpg 213w, https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2018\\\/03\\\/IMG_6300-100x100.jpg 100w\",\"sizes\":\"(max-width: 500px) 100vw, 500px\",\"full_src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2018\\\/03\\\/IMG_6300.jpg\",\"full_src_w\":1936,\"full_src_h\":1936,\"gallery_thumbnail_src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2018\\\/03\\\/IMG_6300-100x100.jpg\",\"gallery_thumbnail_src_w\":100,\"gallery_thumbnail_src_h\":100,\"thumb_src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2018\\\/03\\\/IMG_6300-213x213.jpg\",\"thumb_src_w\":213,\"thumb_src_h\":213,\"src_w\":500,\"src_h\":500},\"image_id\":\"20229\",\"is_downloadable\":false,\"is_in_stock\":true,\"is_purchasable\":true,\"is_sold_individually\":\"no\",\"is_virtual\":false,\"max_qty\":\"\",\"min_qty\":1,\"price_html\":\"\u0026lt;span class=\\\"price\\\"\u0026gt;\u0026lt;span class=\\\"woocommerce-Price-amount amount\\\"\u0026gt;\u0026lt;span class=\\\"woocommerce-Price-currencySymbol\\\"\u0026gt;£\u0026lt;\\\/span\u0026gt;13.99\u0026lt;\\\/span\u0026gt;\u0026lt;\\\/span\u0026gt;\",\"sku\":\"\",\"variation_description\":\"\u0026lt;p\u0026gt;Pob llyfr yn y gyfres am y pris bargen o \\u00a313.99.\u0026lt;\\\/p\u0026gt;\\n\",\"variation_id\":20236,\"variation_is_active\":true,\"variation_is_visible\":true,\"weight\":\"\",\"weight_html\":\"N\\\/A\"},{\"attributes\":{\"attribute_pa_posau-pum-munud\":\"posau-pum-munud-1\"},\"availability_html\":\"\",\"backorders_allowed\":false,\"dimensions\":{\"length\":\"\",\"width\":\"\",\"height\":\"\"},\"dimensions_html\":\"N\\\/A\",\"display_price\":4.9900000000000002,\"display_regular_price\":4.9900000000000002,\"image\":{\"title\":\"img_3111\",\"caption\":\"\",\"url\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3111.jpg\",\"alt\":\"\",\"src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3111-500x500.jpg\",\"srcset\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3111.jpg 500w, https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3111-213x213.jpg 213w, https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3111-100x100.jpg 100w\",\"sizes\":\"(max-width: 500px) 100vw, 500px\",\"full_src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3111.jpg\",\"full_src_w\":500,\"full_src_h\":500,\"gallery_thumbnail_src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3111-100x100.jpg\",\"gallery_thumbnail_src_w\":100,\"gallery_thumbnail_src_h\":100,\"thumb_src\":\"https:\\\/\\\/www.cantamil.com\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/IMG_3111-213x213.jpg\",\"thumb_src_w\":213,\"thumb_src_h\":213,\"src_w\":500,\"src_h\":500},\"image_id\":\"15934\",\"is_downloadable\":false,\"is_in_stock\":true,\"is_purchasable\":true,\"is_sold_individually\":\"no\",\"is_virtual\":false,\"max_qty\":\"\",\"min_qty\":1,\"price_html\":\"\u0026lt;span class=\\\"price\\\"\u0026gt;\u0026lt;span class=\\\"woocommerce-Price-amount amount\\\"\u0026gt;\u0026lt;span class=\\\"woocommerce-Price-currencySymbol\\\"\u0026gt;£\u0026lt;\\\/span\u0026gt;4.99\u0026lt;\\\/span\u0026gt;\u0026lt;\\\/span\u0026gt;\",\"sku\":\"\",\"variation_description\":\"\u0026lt;p\u0026gt;Y llyfr cyntaf yn y gyfres, a gyhoeddwyd yn 2013. 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