Below is a list of ten countries, with one missing. Find one attribute (for example, the population) of each country, so that if you take the first number or first letter of each country’s attribute, in the order shown, it forms a familiar ten-character number, word or phrase. What is the one attribute, and what is the missing country? If more than one country could qualify, then list the country with the largest population, as of August 2019.

South Korea

The attribute is

the currencies of those countries: Hryvnia, Euro, Lempira, Lek, Ouguiya, Won, Ouguiya, ?, Lev, Dollar.

And the missing country is

India, which uses the Rupee, completing the phrase "Hello world".

  • 2
    $\begingroup$ Pakistan uses the pakistan rupee, which may also be a valid answer (if not for the size tiebreaker) $\endgroup$
    – sunfishho
    Aug 3 '19 at 23:02
  • 1
    $\begingroup$ Indonesia, the Maldives, Mauritius, Nepal, Seychelles, and Sri Lanka use rupees too, but India has the largest population. $\endgroup$
    – Duck
    Aug 3 '19 at 23:05
  • 1
    $\begingroup$ Yes, there are other options; Russia would also work, but India is clearly the largest country (by population) that fits this property. $\endgroup$
    – Deusovi
    Aug 3 '19 at 23:43
  • 1
    $\begingroup$ @Duck Indonesia uses Rupiah btw, and it's not similar to Rupee :D $\endgroup$
    – athin
    Aug 4 '19 at 2:26
  • 4
    $\begingroup$ Would the answer then be Chinese Renminbi? $\endgroup$ Aug 4 '19 at 9:39

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