What you cannot hold but it is yours?

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

Move four matchsticks to the below square to form three squares?

Why do we preferably have round manhole covers and not square ones?

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

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What has a bottom at the top?