New Google UK Doodle challenges your math skills

With Google celebrating Thanksgiving with a special Doodle on its homepage in the United States, the web giant is also celebrating the sixtieth anniversary of Stanisław Lem's first book publication. Visitors of Google's UK website will notice an interesting Doodle today, one that challenges their math skills. 

The Doodle starts off with a little animation (which you can speed up if you do not want to wait) and then "ends" with some basic math problems, with a twist of course. The twist is that visitors must use buttons available on the screen to "build" the number - in other words, the answer cannot simply be typed in. 

It's definitely a time waster - try it out!