Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

What Adam and Eve do not have but the rest of the people have?

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.

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

What does this Rebus Picture means ?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

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

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?