Story highlights Lydia Sebastian pushed her parents to allow her to sit the test

She scored 162 on Mensa's Cattell III B paper, which tests verbal reasoning

The top score for an adult is 161, putting her ahead of well-known geniuses

(CNN) A 12-year-old girl who had an inkling she might be quite clever has taken a test and proved she was absolutely right.

Lydia Sebastian achieved the top score of 162 on Mensa's Cattell III B paper, suggesting she has a higher IQ than well-known geniuses Albert Einstein and Stephen Hawking.

The comparison doesn't sit well with the British student, who's currently in Year 8 at Colchester County high school, a selective girl's grammar school in Essex, England.

"I don't think I can be compared to such great intellectuals such as Albert Einstein and Stephen Hawking. They've achieved so much. I don't think it's right," Lydia told CNN.

Lydia sat the test in her summer holidays, after raising the idea with her parents and pestering them for the best part of a year.

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