4 year old girl joins Mensa even before she can start preschool
Heidi Hankins sat an IQ test after staff at her nursery said she was so intelligent they were struggling to find activities to challenge her.
The average score for an adult is 100 and a "gifted" individual 130 but the exceptional youngster impressed examiners with a staggering 159.
Heidi - who can already add, subtract, draw figures and write in sentences - was reading books for seven year olds when she was just two.
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