Y shifft hwyr gyda her fathemateg wythnosol Gareth Ffowc Roberts, a Carys Edwards yw ffrind y rhaglen. Gareth Ffowc Roberts joins Geraint with his weekly maths challenge. Show more
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Y shifft hwyr gyda her fathemateg wythnosol Gareth Ffowc Roberts, a Carys Edwards yw ffrind y rhaglen. Gareth Ffowc Roberts joins Geraint with his weekly maths challenge. Show more