If you want to impress your children with your mental prowess, you might want to give escape rooms a miss and pull out the scrabble board instead.

Twentysomethings may have the sharpest minds — but over-70s have a superior way with words, the Great British Intelligence Test has revealed.

The 's online test — developed in tandem with neuroscientists from Imperial College — has been taken by more than 250,000 people from across the UK.

Researchers found that our ability to solve problems appears to peak in our twenties — and then declines steadily as we get older.

As a result, the experts say that forty-year-old adults have the same problem solving capacities as their twelve-year-old children.

However, it's not all bad news for those of us getting on in years.

The researchers also found that our vocabularies continue increasing well into our 80s, rather than peaking in our 50s–60s as previously thought.

MailOnline