You need to know what country issued the coins/bills. Many different countries have used francs over the years, but today Switzerland is the only European country that still uses the denomination.
Please post a new, separate question with the name of the country and whether you're referring to the francs' value as collectibles or the exchange rate.
It depends on the country that issued it.
Today only Switzerland uses francs. As of early 2012 the Swiss Franc is trading at slightly less than 1 US dollar.
In the past, francs were used by France and Belgium but both were replaced by the euro in 2002. Even though the two currencies had the same name French and Belgian francs were worth different amounts. Neither was much when converted to dollars then, and they no longer can be exchanged.
You can find exact historical rates over the years by looking at a site such as xe.com.
The French Franc was locked to the value of the Euro on 31 December 1998 at a rate of €1 = 6.55957F.
It ceased to be legal tender after the Euro was introduced on 28 February 2002, although old coins and notes can still be exchanged at banks.
At current exchange rates (12 January 2009), one French Franc would be worth about €0.14 (EUR), $0.20 (USD), £0.14 (GBP) or $0.24 (CAD).
Convert 10000 dix mille francs to naira
Nothing, absolutely nothing. When I was a boy, just after the war, 1000 francs was 2 dollars; when the Euro came in, 10 francs was 2 dollars. Now, francs no longer exist as currency.
Between 1939 and 1945 there were no 10 franc coins struck in France, with an exception for a few patterns in 1941 (Général Pétain)...
36,000 Swiss francs = 33,740 US dollars. There are no French/Belgian francs
one US dollar is worth 1.02 Swiss francs
512 million francs are worth 78 054 000 euros (fixed exchange rate for 1 euro= 6.55957 francs)
50 French Francs = 10.3 USD
About 45¢.
2 francs sherlock
There is no 29 Franc gold coin. If you mean 20 francs it is worth about $250.
36,000 Swiss francs is equal to 39,588.72 American dollars. One franc is equal to 1.10 dollars and one dollar is equal to 0.91 francs.
Alas, 5 francs is now no money at all. When France went over to the Euro, the new euro was worth about 7 francs.