A simple maths puzzle has been leaving people stumped as they can't agree on the correct answer - can you work it out?

A maths question that should be 'easy' to solve has been leaving people online completely stumped, as one twist makes it much ...

Which number must be inserted in place of the incorrect number? Show puzzle solution The number 75 must be replaced by the ...

Are you ready to prove your mental sharpness and IQ power in just 5 seconds? Only those with razor-sharp focus and heightened observation will spot the odd number in time.

The opening of a crisis center for children means youth in and around Huntsville will soon be able to access mental health ...

In Connections, each category has a different difficulty level. Yellow is the simplest, and purple is the most difficult.

September/1992024/Picture-Puzzle-Triangle.jpg" width="1200" height="675" /> Challenge your brain with this engaging picture ...

The odd number in the picture is highlighted below ... Keep practising these puzzles to sharpen your observation skills and keep your mind active. Stay tuned for more brain teasers and IQ tests ...

NPR's Ayesha Rascoe plays the puzzle with WLRN listener Ann Kritzer of Coral Springs, Fla., and Puzzlemaster Will Shortz.

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.