A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

There are three identical triplets sisters. Demi is the oldest of them all and she always speaks the truth. Diana is the next one who is a liar always. Drew, the youngest of them all speaks both truth and lies randomly.

On a rainy day, a family friend Victor visited them. Since there were starkly identical, he was not able to recognize them. Thus to clarify, he asked one question to each one of them.

He started with the one standing on the left and asked, 'Which sister is in the middle of you three?' She answered, 'That's Demi.'

Then, he asked the one standing in the middle, 'What is your name?' She answered, 'I am Drew.'

Finally, he asked the one standing on the right, 'Who is standing in the middle?' She answered, 'She is Diana.'

Victor was left baffled. He asked the questions three times and received different answers every time.

Can you tell who was who?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

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

What Am I?

You need to remove two matchsticks to make the below equation true. Can you do it ?

What number should come in place of the question mark below?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

The answer I give is yes, but what I mean is no. What was the question?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?