If you already have a nagging sense of feeling old and dumb, look away now: 11-year-old British schoolgirl, Kashmea Wahi, just achieved the highest possible score on an IQ test - an incredible 162.

Of course, the usual caveats about IQ (Intelligence Quotient) tests apply: they're not necessarily all that accurate in estimating someone's overall intelligence, even if they are good markers for specific cognitive skills such as mathematical ability and logical reasoning. Nevertheless, Kashmea's maximum score is an impressive achievement - she's one of the youngest people to ever achieve the score on the 150-question Cattell III B Mensa test, because you have to be at least 10.5 years old to take it.

The schoolgirl apparently stumbled across the test on her iPad, and took it as a way to prove a point to her parents - both IT consultants who work at Deutsche Bank in the UK - who were nagging her to spend more time studying. The result puts Kashmea in the top 1 percent of the world's smartest people (of any age).

"It's overwhelming to be compared with the likes of Stephen Hawking and Albert Einstein," she told India Today. "The comparison is implausible and I believe it would take loads of achievements for anyone like myself to be able to get into the league of such legends. Anyway, I am buzzing with excitement."

Kashmea currently studies at Notting Hill and Ealing Junior School in West London, and lists her interests as netball, tennis, and chess (she's competed in the latter at a national level). Her IQ score means she can apply to be a member of Mensa - the organisation which accepts anyone in the top 2 percent of the population in terms of IQ. A 'genius' level score is considered to be anything over 140.

There seems to be a growing number of super-bright schoolgirls in Britain. Only last September, 12-year-old Lydia Sebastian from Essex took the test and scored another perfect 162.

But child geniuses can be discovered much earlier - according to the US arm of Mensa, the age range for current members stretches from 2 to 102 years old. One in 50 people are eligible for a Mensa membership, though only 57,000 have signed up in the US, based on the figures from 2011.

As for Kashmea, there's no word on whether her parents are now being less strict when it comes to homework - maybe they'll use her ridiculous IQ as a way to guilt her into getting everything done on time instead.

"We are ecstatic at Kashmea's Mensa achievement," they said. "Although we always believed she had the intellectual prowess, the acknowledgement is reassuring that she does possess the ability, the energy, which if well channelised, can lead to something wonderful."