Learn Turkish: Otelde iki büyük oda var. - There are two big rooms in the hotel.

The locative suffix adapts to the word it attaches to. Because the last vowel in otel is 'e' (a front vowel), vowel harmony dictates we use -de instead of -da. Also, because otel ends in 'l' (which is a soft consonant), the 'd' does not mutate into a 't'.

Shouldn't 'two rooms' be pluralized as iki odalar?

In Turkish, whenever you use a specific number (like iki) before a noun, the noun must remain singular. Adding a plural suffix after a number is a very common mistake for English speakers. Always remember: iki oda (literally 'two room'), never iki odalar.

Why does var come at the very end of the sentence?

Turkish generally puts the verb or main predicate at the very end. The word var acts as the predicate meaning 'there is' or 'there are'. The typical structure for pointing out where things are is: Location (otelde) + Subject (iki büyük oda) + Exists (var).

Is there a strict rule for the order of iki (two) and büyük (big)?

Yes! Just like in English, numbers are placed before descriptive adjectives. You say iki büyük oda (two big rooms). If you said büyük iki oda, it would sound just as backwards as saying 'big two rooms' in English.