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

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

If a wheel has 54 spokes, how many spaces are there between the spokes?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?