Derek Skipper age 92 who has just received his GCSE Maths results. A sprightly pensioner has become the oldest person in Britain to ever pass a GCSE exam - at the grand age of 92. See SWNS story SWNAoldest. Derek Skipper, 92, took his Maths GCSE in May and has passed with flying colours after he achieved a grade five, the highest possible on the foundation paper he took. The granddad-of-three has said he is 'very pleased' about his results.