What will you call your mother's brother's brother-in-law?

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?

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Find the hidden panda in the image below.

If you say my name, I will no longer exist. What am I?

Spot the cat in the picture below

John was piloting a plane behind a car but was never able to overtake it. Why?

Can you count the number of blocks in the picture below?

What is the coolest letter in the alphabet?