“Can you find the missing number in 15 seconds?” the brain teaser reads. This puzzle tests both your sharp vision and quick thinking under pressure. X users actively tired to solve this brain ...

Brain-training puzzles are one of the most popular ways to enhance memory and cognitive abilities. These puzzles stimulate ...

FT.com will bring you the crossword from Monday to Saturday as well as the Weekend FT Polymath.

A maths puzzle that only 10% of people can solve has been shared on TikTok, but people have been left scratching their heads over the answer – can you work it 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.

The finished puzzle is a section of the periodic table, so the numbers on each tile are their atomic numbers - that means they increase from left to right and top to bottom. Another helpful clue ...

Prove that the number of dots with an odd number of lines that connect them is even. Show puzzle solution Because two people are involved in every handshake, if we add up the number of handshakes ...

Include a filled-in answer grid with numbers. Include your name, address and email address on the grid page. Please label your files LastName_PuzzleTitle for ease of editor review. Puzzle titles ...