Andrey Solovyev

Learn the names, capitals and flags of all 10 Canadian provinces & 3 territoriesThis app tests your

This is the new version of the app without advertisements.Learn all 26 cantons of Switzerland - from

This free trivia app is a great way to test your knowledge of national capitals, practice before the

Carboxylic acids and esters are one of the most important classes of organic compounds. They are eve

Do you know the formula of ammonia? Or hydrogen peroxide? What is the structure of benzene?Learn 200

Guess the names of the 210 most famous cities in the world looking at the pictures of their landmark

For all opera fans! Demonstrate your knowledge of the 50 most performed operas by the most important

There are the 450 most recognizable persons from the world history in this app: kings and queens, po

This is the best opportunity to learn all important national flags of the countries and territories

Do you know how the Mexican flag looks like? Do you remember the order of colors on the Irish flag?