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

I n the world of the internet, brain teasers have become one of the most popular forms of entertainment. They not only ...

This math puzzle will test your intelligence and analytical thinking skills. Look at the image and study the pattern carefully. Have you found the missing number? Hurry up; time is running out.

Sudoku fans, it’s time to really crunch some numbers. Give your mind the ultimate test on the most difficult numbers puzzle each day — and challenge yourself to make the impossible possible.