I've assigned numbers to several European nations as shown below. My question is: what's my methodology in choosing these numbers? What would the numbers for Estonia, Latvia, and Lithuania be?

(Note: I may have made a mistake, in which case I am sorry.)

Portugal: 90

Spain: 90

United Kingdom: 32

The Netherlands: 35

Norway: 105

Sweden: 45

Belarus: 95

Bulgaria: 87

Armenia: 117

Russia: 127

I will periodically release hints with more countries and numbers.

Hint 1

Italy: 90.

  • 1
    $\begingroup$ (Note: I may have made a mistake, in which case I am sorry.) Deliberate? $\endgroup$
    – m4n0
    Jun 6, 2020 at 17:51
  • 1
    $\begingroup$ @ManojKumar hopefully my nunbers are accurate but there is a chance that I missed something. $\endgroup$ Jun 6, 2020 at 17:58
  • $\begingroup$ Something to do with R-Ebnq Argjbex? $\endgroup$
    – m4n0
    Jun 6, 2020 at 18:45
  • $\begingroup$ Then Fvkgl Frira can be the missing number. $\endgroup$
    – m4n0
    Jun 6, 2020 at 18:52

1 Answer 1


The answer is probably

Estonia - 77 (initial wrong answer: 67), Latvia - 77, Lithuania - 85

That's because

This number of a country is the largest "main" European road number (numbered Exx (xx=01 to 99) or E1xx (xx=01 to 29)) which runs through that country.

I've figured it

just being a fan of Euro Truck Simulator 2 game, and so memorising some E-road numbers which run through certain countries.

  • $\begingroup$ This is correct. $\endgroup$ Jun 6, 2020 at 21:13
  • $\begingroup$ Wait, I have just realized that one of your numbers is wrong, though i will still accept this answer since you got the method. Rot13(Gur R-friragl frira oneryl ragref rfgbavn) $\endgroup$ Jun 6, 2020 at 21:18
  • $\begingroup$ Thanks. I've updated the answer, now it's probably correct. $\endgroup$
    – trolley813
    Jun 6, 2020 at 21:25

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