There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

A father's child, a mother's child, yet no one's son.

Who am I?

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?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Which alphabet is a part of our body?

What word is pronounced the same if you take away four of its five letters?

Which number should replace the question mark?