Devon schoolboy Rory Bidwell achieved the maximum score of 162 on the Cattell III-B test - despite not having prepared for it.

His dad James Bidwell told Sky News the family's first reaction to the score was "that's a big number - what does that actually mean?".

A bit of Googling revealed Einstein and Stephen Hawking are both said to have had IQs of around 160. That was when it started to sink in that it was "really quite impressive", Mr Bidwell said.

"We've always known he's an incredibly bright lad. This just puts it in context."

Rory found the test "pretty easy", his dad said, and had no problem finishing it in the time limit.

He sat the two-hour test in Exeter a fortnight after his twelfth birthday and was invited to join Mensa days later.

Mensa is a society for people who have IQs in the top 2% of the public, as judged in standardised tests.

Besides being incredibly intelligent, Rory is very sporty and just "a very normal 12-year-old", Mr Bidwell said.

"He's certainly not sat there doing quantum physics at tea time.

"He's on his PlayStation playing Fortnite and being shouted at to get off it, he's down the park kicking a ball about with his mates. He just has this incredible gift as well."

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Mr Bidwell said Rory had always done things "first, best and quickest", from walking early to doing Year 7 algebra when he was in Year 2.

As a toddler, he got bored of how easy his puzzles were so did them upside down without the pictures, Mr Bidwell said.

When it comes to how Rory will use his talents in future, his dad says he "hasn't a clue what he wants to do".

"If he had his choice he'd still be a footballer," he said.

Mr Bidwell added they encourage him to try his best with everything, so when he does decide what he wants to focus on he's set up to pursue it to the highest level.

Could you join Mensa?

Test your brain with some sample questions from Mensa - answers at the bottom.

1.

2. Replace the blanks in the following sentence with three four-letter words:

The same four letters must be used for all three words. What are the words?

THE YOUNG MAN _ _ _ _ _ _ _ _ OF MONEY, BECAUSE HE COULD NOT WALK

AWAY FROM THE _ _ _ _ MACHINES.

3. What number should replace the question mark in this sequence?

1 - 2 - 3 - 7 - ? -155 - 3411

And now for the answers:

1. 50. Star = 2, triangle = 10, square = 19.

2. Lost, lots and slot

3. 22. Multiply the first two numbers and add one to give the third number, multiply the second and third numbers and add one to give the fourth number and so on.

More questions are available on the Mensa Website.