Hidden inside a sea of 02s is the number 20 waiting to be spotted ... the 20 lies nine rows from the bottom somewhere in the middle row of the grid. If you like your puzzle intact, look away now ...

Some numbers are so unimaginably large that they defy the bounds of modern mathematics, and now mathematicians are closing in ...

A brain teaser has left many scratching their heads as they search for the odd number out - so can you spot the number 725 in the image in just seven seconds?

Test your cognitive skills with this tricky number puzzle designed to challenge your pattern recognition and logic. Created by Tombola, this brain tea ...

A brain teaser on X featuring a 3×3 number grid sparked over 12k views and 300+ comments as users debated the missing number's solution. Brain teasers have long been a favourite among puzzle ...

Latest on Crossword FT Weekend Magazine Crossword Number 742 The FT crossword blog: how to be masters in the art of solving puzzles Mini Crossword Number 58 FT Crossword: Number 18,055 ...

It might not seem like there's enough information to solve these logic puzzles at first—but that's part of the fun!

Get the most from The Financial Times with personalised special reports, recommended reads and latest feature announcements.Receive exclusive personalised event invitations, carefully-curated ...

Prime Number Puzzle Has Stumped Mathematicians for More Than a Century Experts have only started to crack the tricky twin prime conjecture By Manon Bischoff edited by Daisy Yuhas ...