A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

With the help clues provided in the image, can you find the 5 digit key?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

What occurs twice in a week, once in a year but never in a day?

What has lots of eyes, but can’t see?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

One night, a woman receives a call from the police. They tell her that her husband was murdered and that she should come to the crime scene as soon as possible. The woman drops the phone, shocked, and drives 20 minutes to the crime scene. As soon as she reaches the crime scene, the police arrest her and she is convicted of murder. How do the police know she committed the crime?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

In the picture given below, can you find out which digit will take place of the question mark?