You need to move three matchsticks to form three squares. Can you do it?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

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.

What is the centre of gravity?

Which country gets ill every time?

Which is the correct shadow of the bird?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

Why 1729 is a magic number? Answer Logically.

If you say my name, I will no longer exist. What am I?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches