Sherwyn Sarabi, who read from the age of two and had his IQ tested as 160 when he was four, is also planning on taking his physics GCSE.

The gifted pupil, who also loves wrestling, music, playing with his dog Papoo and gymnastics, had hoped for a C grade but consoled himself that his D score was not far short

He said: "I got 58 or 59 marks and a C was 70. I could have got a C.

"It doesn't matter though, I still passed.

"I'm going to go to A-level even though I haven't got an A or A*."

Asked when he might take the paper, he said: "I'm not sure, maybe next year."

He sat two one hour 45 minutes papers and passed the GCSE despite walking out of one exam 35 minutes early.

Sherwyn had only studied the GCSE syllabus for six months and missed some of the modules, his proud mother Amanda said.

The former music teacher stressed he was allowed to have a normal childhood, but he loved to learn and she strongly denied she and husband Davoud were "pushy parents".

She said: "This is not something we decided, it is something we have to do to keep him happy."

Although she and her husband went to university, they have no experience in their family of someone so gifted.

"He does gymnastics, football, swimming, and he's started wrestling, he is active like any six-year-old."

But he also loves reading, and the time he spends each day learning leads him to make rapid progress, she said.

Mrs Sarabi has written a book about her experience as the parent of a gifted child, and explained it is not always easy.

She also thanked Sherwyn's tutor Ken Hewitt, saying: "We are very grateful to him as it's not easy to teach GCSE maths to a six-year-old."

The family has moved from Barnsley to Catterick Garrison, North Yorkshire, so Sherwyn can attend Aysgarth School in Wensleydale.

The walls of the family home's hall and kitchen are covered in certificates and he has trophies and cups in his bedroom.

His appetite for learning stems from having a phenomenal memory and an ability to read quickly, his parents said.