This reminds me of another one from when I was a kid...
1. Pick a number from 1-10
2. Multiply it by 9
3. Add the two digits together (if its single just use that)
4. Add 3
5. Divide by 3
6. Take the number and match it to the corresponding letter of the alphabet e.g. 1=A, 2=B, 3=C etc
7. Use the letter to pick a country in Europe
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The country you chose is...Denmark!