There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

What's a single-digit number with no value?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?