9
There are eight candles for the eight nights of Hannukak, and one bigger candle (usually centered) which is the candle used to light the rest.
In some households, each person lights a separate menorah. In others, the father of the family lights the menorah.
The Shamash is the candle that lights the other candles
The Chanukah Menorah is lit by the head of each household. In some households, every person in the house lights their own Menorah. In other families, only the children light it.
the menorah and the nine candles are on it. the middle one lights the other eight.
The Hanukkah lights, or menorah, are traditionally displayed for eight nights during the festival of Hanukkah, which usually falls in late November to late December. The menorah is lit each evening after nightfall, and the lights are typically left burning for at least half an hour after the stars appear. After the final night of Hanukkah, the menorah is generally taken down and stored until the next year.
That candle holder is referred to as a "Hanukkah-menorah", or Hannukiyah. The original Menorah was the holder of the oil lights in the Tabernacle in the Wilderness, and had seven branches. The holder for the Chanukah lights ... whether candles or oil ... has places for eight lights, plus an elevated holder for one more that's used to light the other eight.
You only light all 9 candles on the last night of Hanukkah.
there are nine.
6
there are 8 candles
9
If it appears to be a Hanukkah-menorah, then (though it isn't technically a sin), it isn't acceptable, since it may look as if the person is adding other days to Hanukkah.