For examle, to say twenty-one (21) you need to combine twenty (20) and one (1). Plus, it's pretty much the only way to defend yourself against the wrong amount of vodka shots. The good news is that most of the time, you’ll only need to use the nominative case. Counting in Russian isn't all that hard.

Compound numbers in Russian are formed same as in English. Russian can be written in Latin alphabet or in Cyrillic alphabet. Using Russian for numbers and counting can be tricky if you need to work extensively with numbers, such as in mathematics and accounting. Official language in Russia, Belarus, Kazakhstan, Kyrgyzstan, and Moldova, it also has the co-official status in other countries, and counts about 164 million speakers.

Each Russian number has six forms depending on how it’s used!