Can You Answer These Riddles?

You are lost and alone in the woods. You stumble across an old cabin, and decide to stay there for the night. You want some heat and light, but the only things you find in the cabin are a candle, an oil lamp and a wood burning stove. You look in your pocket but you only have one match left. What do you light first?

Finished files are the result of years of scientific study combined with the experience of years. How many F's are in the previous sentence?

Some cogs are tigs. All tigs are bons. Some bons are pabs. Some pabs are tigs. Therefore, cogs are definitely pabs. - True or False?

A black dog stands in the middle of an intersection in a town painted black. None of the street lights are working due to a power failure caused by a storm. A car with two broken headlights drives towards the dog but turns in time to avoid hitting him. How could the driver have seen the dog in time?

A man wants to enter an exclusive club, but he doesn't know the password. Another man walks to the door and the doorman says 12, the man says 6, and is let in. Another man walks up and the doorman says 6, the man says 3, and is let in. Thinking he had heard enough, he walks up to the door and the doorman says 10, he says 5, and he isn't let in. What should he have said?