What begins with T, ends with T, and has T in it?

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?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Can you find the mistake in the below statement?

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

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

Identify the hidden meaning behind this picture?

A man dies of old age on his 25 birthday. How is this possible?