A challenging maths puzzle requires you to uncover the logic behind unconventional equations. Only a few have succeeded.

A version of this puzzle originally appeared in the February 1957 issue of Scientific American. We’d love to hear from you! E ...

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

but it also has all the games that are fun to play, with the numbers for 2024 to prove it. Known for its iconic crossword puzzle that it unveiled on Feb. 15, 1942, the New York Times has expanded ...