There was an aeroplane crash, every single person died, but two people survived. How is this possible?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

What is the centre of gravity?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

I make two people out of one. What am I?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Client Dempsey living in one of the East Coast states of the U.S. was talking to Landon Donovan, who was living in the West Coast state of the U.S.

Dempsey: What time is it?
Donovan: Wow, It is the same time here.

How is this possible?