puzzle

Rubik's Cube
27.11.2024

A Russian engineer has created a miniature copy of the Rubik's Cube - only 1 centimeter.

Igor Zur interesting records Guinness Book of Records interesting facts Records and anti-records 27 November 2024
calculator
27.08.2024

We tell you how a simple arithmetic example divided mathematicians into two camps.

Timur Khomichev mathematics a riddle People and Events 27 August 2024
Crosswords
14.05.2024

The most difficult tasks for developing logic are named - "the problem of recognition", "sum-do-ku" and "Kakuro puzzle".

Igor Zur mathematics a riddle Records and anti-records 14 May 2024