Depends on the year (coins have been periodically minted for Hong Kong since the 1860's), the denomination or type of the coin, and the condition it is in.
exactly 1 hong kong dollar :)
More than one Hong Kong coin had a hole in the middle. These coins were made for many years. Be more descriptive. Add the date and words on the coin, then I can answer your question.
A 2013 Hong Kong $5 coin is still worth its face value of $5 if used as legal tender in Hong Kong. However, if sold to a collector or numismatist, it may be worth slightly more depending on its condition and rarity.
1 HKD
How much is a 1960 Hong Kong Modern Uncirculated Type Set worth
Yeah
100.00
ten cent
Type your answer here... 25 cents
in new zealand, it is equivalent to 10 cents
Need to be more specific. 8 types of coins were minted in 1980, and their values vary from a few cents to $900.