There is no evidence that he learnt any mathematics, but we cannot rule out Stokes introducing him to Euclid 's Elements which he was well capable of teaching (although there is evidence mentioned below that Newton did not read Euclid before 1663).
Walang katibayan na siya learnt anumang matematika, ngunit hindi namin ng panuto Stokes nagpapakilala siya sa Euclid 's Sangkap na kung saan siya ay mabuti kaya ng pagtuturo (bagama't may ay katibayan ng nabanggit sa ibaba na Newton hindi basahin Euclid bago 1663).