How many words can a pen with half refill write?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

If your uncle’s sister is not your aunt, what relation is she to you?

Which number should replace the question mark?

what does this below rebus represent identXQQQQQME

You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.