Learn Icelandic: Hvar eru sex læknar?

No, it doesn't! While the Icelandic numbers 1 through 4 change to match the gender and case of the noun they describe, the numbers 5 through 10 (including sex) do not change. Sex will always be sex, no matter what word comes after it.

What is the singular form of læknar?

The singular form is læknir (doctor). Because we are talking about six of them here, we have to use the plural form. For this masculine noun, the -ir ending changes to -ar, making it læknar.

Why do we use eru here instead of er?

Eru means "are," which is the plural form of the verb "to be." Since we are asking about multiple doctors, we need the plural verb. If we were only asking about one doctor, it would be singular: Hvar er einn læknir? (Where is one doctor?).

Is the number sex pronounced just like the English word?

Yes, it is pronounced almost exactly like the English word "sex." The Icelandic letter x makes a "ks" sound, and the e makes a short "eh" sound, making this number very easy for English speakers to say!