Can you replace the question mark with the correct number in the below table sequence?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

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?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

You see me once in June, twice in November, and not at all in May. What am I?

What Time Should the last watch show in the below figure?