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

Why is a river so rich ?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?