An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

Find the missing letter in the last circle logically in the given below picture.

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

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

Make a sentence consisting of three words that have the whole alphabet.

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

I am the fastest animal but cannot climb the tree. What am I?