Can you replace the question mark with the correct number?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

An apple seller is hosting a competition. He offers 1000 apples and 10 boxes to the people who pass by. The challenge is to put those 1000 apples in the 10 boxes in such a manner that if he asks for any amount of apples, the person can directly give him the boxes or a combination of boxes. If the person can do it, he promises to give a thousand apples for free.

If you happen to pass by the apple seller, will you be able to win a thousand apples?

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

What kind of band never plays music?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.