Girl, 4, joins Mensa after teaching herself to read

A four-year-old girl has been accepted into Mensa after achieving a score of 159 on an IQ test, just a point less than science genius Stephen Hawking.

Heidi Hankins, who is officially brainier than Carol Vorderman (154), was spotted as being of a “genius level” of intelligence after she taught herself to read, add and subtract and was able to count to 40 at the age of two, having already started using a computer at 18 months.

The average adult’s IQ is 100 and in gifted individuals it is 130.