A seemingly straightforward maths problem has divided the internet, with experts and social media users fiercely debating whether the answer is 1 or 9. Discover why this viral equation has everyone talking.
A baffling optical illusion featuring a black wireless earbud has gone viral, leaving thousands of Brits frustrated and questioning their eyesight as they struggle to find the hidden device.
A deceptively simple optical illusion is taking the internet by storm, with only the most observant people able to spot the hidden number within seconds. Can you beat the challenge?
Tackle The Guardian's notoriously difficult Sudoku puzzle 7060 with our expert solving strategies and mental workout tips for serious puzzle enthusiasts.
Prepare for the most demanding Killer Sudoku puzzle yet as puzzle 990 pushes logical thinking to its absolute limits. Discover why this numerical nightmare is captivating puzzle enthusiasts worldwide.
A deceptively simple brainteaser is leaving people scratching their heads across the UK. Discover the clever solution to this mathematical puzzle that's going viral.
Prepare for a mental workout with The Guardian's latest hard-level Sudoku puzzle. Expert strategies and tips to help you solve this brain-teasing number grid.
Exercise your mental muscles with our latest medium-level Sudoku challenge. Perfect for puzzle enthusiasts looking to test their logical reasoning skills.
A challenging new brainteaser sweeping the internet dares you to find a perfectly camouflaged owl hidden among a complex pattern. Can you beat the average time of 63 seconds?
Sharpen your pencils and your wits! The Guardian's latest 'easy' grade Sudoku puzzle, number 7045, is live. Discover why this classic number game remains a powerhouse for mental fitness and daily routine.
A new brain-teasing optical illusion is taking the internet by storm. This seemingly simple image of a snowy landscape hides a perfectly camouflaged panda, and only those with the sharpest eyesight can find it in under 30 seconds. Are you up for the chall
A new viral puzzle is baffling the internet with its hidden letter trick. Can you spot the odd one out in this mind-bending optical illusion that's leaving 99% of people stumped?
A classic geometric puzzle, known as the T-Puzzle, is taking the internet by storm again. Can you solve this fiendishly simple challenge that tricks 95% of people on their first attempt?
A classic geometric puzzle, known as the T-Puzzle, is stumping minds online. With just four pieces, this century-old conundrum appears simple but reveals a fiendish challenge that tests spatial reasoning and patience.
Challenge your logical thinking with The Guardian's Sudoku #7037, rated 'Easy'. A fantastic way to boost your cognitive skills and enjoy a classic puzzle.
The Complete University Guide's 2025 league table for Mathematics is out, featuring a major upset at the top. Discover which universities are leading in maths education, research, and graduate prospects across the UK.
A viral maths brain teaser has left thousands baffled across the UK. This seemingly simple puzzle about brothers' ages is proving surprisingly tricky - can you crack it?
A fiendishly difficult brain teaser is taking the internet by storm, with claims you need a 'sky-high IQ' to solve it. Can you crack the code and find the missing number?