Required Mathematical Intelligence

Chapter 138 Candles on the table
There were 12 freshly lit candles on the table in the room and the wind came in through the window and blew out 2 candles.After a while, another candle was blown out by the wind.After closing the windows, no more candles were blown out.How many candles are left on the table at the end?
[Answer: There are 3 candles left on the table.Because the 3 candles that were blown out did not burn out, the other 9 candles were all burned out, so there are still 3 candles left. ]
(End of this chapter)