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

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

In which direction should the missing arrow point?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

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

Find the next number in the series below

21 32 54 87 131 ?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

What kind of band never plays music?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?