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

The challenge here is to count the number of watermelons in the picture. Test your attention to detail with this brain teaser puzzle. Your time starts now! Look at the image and study it carefully.

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

Do you enjoy a good brain challenge? Here’s one that might look easy, but only the sharpest minds can solve it in just 6 ...

This puzzle plays similarly to the hugely popular word game Wordle. Guess the numbers in the correct order to open the door. You can shine the Blacklight on the keypad to see which numbers have ...

In today's optical illusion, evaluate your observation skills! Can you find the missing number hidden within this vibrant mix ...

(Also read: You've got a genius-level IQ if you can figure out the total number of ducks in this tricky brain teaser) Ducks dilemma: Another puzzle leaves users guessing Previously, the same user ...

The new games include a mini crossword puzzle; a word search; Word Wheel, which is about connecting letters to create words; and a word guessing game called Guess Word. You can see what they all ...

Want your next Windows laptop to feature a number pad? Here's the best you can buy right now. Laptops come in all shapes and sizes these days, which means not every laptop you come across will ...

From the humble trillion to Graham's number, here are some of the most massive numbers ever conceived by humans. Big numbers are everywhere, from the cells in the human body to the size of the ...