Keeping your brain active is widely acknowledged to boost cognitive function, sharpen memory, and enhance concentration.

Some experts even suggest that regular mental exercises could postpone the onset of dementia symptoms.

Brainteasers, which come in various forms such as puzzles, riddles, and maths problems, each target different cognitive skills.

The latest perplexing puzzle to hit social media combines wordplay with maths, and it’s said that a staggering 99% of people get it wrong on their…