There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

What 5-letter word typed in all capital letters can be read the same upside down?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

What has many keys but can’t open a single lock?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?