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1. How many letters in the Ukrainian alphabet?
2. When did they baptize Rus?
3. How do swimmers tie flippers?
4. How is the factorial of 7 written?
5. In what state, according to one theory, was the universe before the Big Bang?
6. What was the name of the annoying dog in Krylov's fable?
8. What is the speed of light?
9. What is the most common chemical element on Earth?
10. What is the Roman numeral L?
11. To which group of elements does fluorine belong?
12. How are varieties of the same element called different in properties?
13. What is a black hole?
14. What did President Donald Trump choose?
15. Which of these movies did not film Leonid Gayday?