Can you name some countries which do not have the alphabet 'A' in them?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

Can you make a fire with just a single stick?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

What has no start, end, or centre?

I have teeth but i don't bite. Who Am I ?

Who has married many women but was never married?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

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